c語言學生管理成績
❶ 學生成績管理： c語言
參考代碼如下，不過還是建議自己寫一寫比較好：
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
struct student //結構體
{
char name[20]; //姓名
char number[20]; //學號
double math; //數學
double english; //英語
double chinese; //語文
double program; //程序
}s[50];
void head() //界面
{
printf(
"**********************************************************************\n"
"** **\n"
"** **\n"
"** 學生成績管理系統 **\n"
"** **\n"
"** 1.信息錄入 **\n"
"** 2.信息統計 **\n"
"** 3.信息瀏覽 **\n"
"** 4.信息查詢 **\n"
"** 5.信息排序 **\n"
"** 6.信息刪除 **\n"
"** 0.退出系統 **\n"
"** **\n"
"**********************************************************************\n"
);
}
void ru(struct student s[], int* n) //文件導入函數
{
FILE *p;
int i=*n;
if((p=fopen("數據.txt", "r"))==NULL)
{
n=n;
}
else
{
while(!feof(p))
{
fscanf(p, "%s%s%lf%lf%lf%lf\n", s[i].name, s[i].number, &s[i].math, &s[i].english, &s[i].chinese, &s[i].program);
i++;
*n=*n+1;
}
}
fclose(p);
}
void chu(struct student s[], int n)
{
FILE *p;
int i=0;
if((p=fopen("數據.txt", "w"))==NULL)
{
printf("無法打開此文件！");
}
else
{
while(i<n-1)
{
fprintf(p, "%s %s %lf %lf %lf %lf\n", s[i].name, s[i].number, s[i].math, s[i].english, s[i].chinese, s[i].program);
i++;
}
fprintf(p, "%s %s %lf %lf %lf %lf", s[i].name, s[i].number, s[i].math, s[i].english, s[i].chinese, s[i].program);
}
fclose(p);
}
void dayin(struct student s[], int n) //顯示所有信息
{
int i;
double all=0.0;
printf("\n姓名\t\t學號\t\t數學\t英語\t語文\t程序\t總分\n");
for (i=0; i<n; i++)
{
all=s[i].math+s[i].english+s[i].chinese+s[i].program;
printf("%s\t\t%s\t\t%.1lf\t%.1lf\t%.1lf\t%.1lf\t%.1lf\n", s[i].name, s[i].number, s[i].math, s[i].english, s[i].chinese, s[i].program, all);
}
}
void shuru(struct student s[], int* n) //信息輸入函數
{
int i=*n, j, k, m;
printf("請輸入學生姓名:");
scanf("%s", s[i].name);
printf("請輸入學生學號:");
for (j=0; ; j++)
{
m=0;
scanf("%s", s[i].number);
for (k=0; k<i; k++)
{
if (strcmp(s[i].number, s[k].number)==0)
{
m=m+1;
printf("學號重復，請重新輸入學號:");
break;
}
}
if (m==0)
{
break;
}
}
printf("請輸入數學成績:");
scanf("%lf", &s[i].math);
printf("請輸入英語成績:");
scanf("%lf", &s[i].english);
printf("請輸入語文成績:");
scanf("%lf", &s[i].chinese);
printf("請輸入程序成績:") ;
scanf("%lf", &s[i].program);
printf("添加信息成功！\n");
*n=*n+1;
chu(s, *n);
}
void paixu(struct student s[], int n) //排序函數
{
int i, j;
double all1, all2;
struct student stu;
for (i=0; i<n-1; i++)
{
for (j=i+1; j<n; j++)
{
all1=s[i].math+s[i].english+s[i].chinese+s[i].program;
all2=s[j].math+s[j].english+s[j].chinese+s[j].program;
if (all1<all2)
{
stu=s[i];
s[i]=s[j];
s[j]=stu;
}
}
}
printf("排序後的數據：\n");
dayin(s, n);
}
void chazhao(struct student s[], int n) //查找函數
{
char name[20], num[20];
int m1, m2=0, i, j;
printf("1.按姓名查找\n2.按學號查找\n選擇查詢方式（1或2）:");
scanf("%d", &m1);
if (m1==1)
{
printf("請輸入您要查找的學生姓名:");
scanf("%s", name);
for (i=0; i<n; i++)
{
if (strcmp(s[i].name, name)==0)
{
m2=m2+1;
if (m2==1)
{
printf("\n姓名\t\t學號\t數學\t英語\t語文\t程序\n");
}
printf("%s\t\t%s\t\t%s\t\t%s\t\t%s\n", s[i].name, s[i].number, s[i].math, s[i].english, s[i].chinese, s[i].program);
}
}
if (m2==0)
{
printf("沒有此學生信息!\n");
}
}
else if (m1==2)
{
printf("請輸入您要查找的學生學號:");
scanf("%s", num);
j=0;
for (i=0; i<n; i++)
{
if (strcmp(s[i].number, num)==0)
{
m2=m2+1;
if (m2==1)
{
printf("\n姓名\t\t學號\t數學\t英語\t語文\t程序\n");
}
printf("%s\t\t%s\t\t%s\t\t%s\t\t%s\n", s[i].name, s[i].number, s[i].math, s[i].english, s[i].chinese, s[i].program);
}
}
if (m2==0)
{
printf("沒有此學生信息!\n");
}
}
}
void shanchu(struct student s[], int* n) //刪除函數
{
char num[20];
int m=0, i, j;
printf("請輸入您要刪除的學生學號:");
scanf("%s", num);
for (i=0; i<=*n; i++)
{
if (strcmp(s[i].number, num)==0)
{
m=m+1;
for (j=i; j<*n; j++)
{
s[j]=s[j+1];
}
*n=*n-1;
}
}
if (m==0)
{
printf("沒有此學生信息!\n");
}
else
{
chu(s, *n);
printf("刪除完畢!\n");
}
}
void allAndAver(struct student s[], int n)
{
int i ;
double all=0.0, aver=0.0;
for (i=0; i<n; i++)
{
all=s[i].math+s[i].english+s[i].chinese+s[i].program;
aver=all/4;
printf("%s\t\t%s\t\t%.1lf\t%.1lf\n", s[i].name, s[i].number, all, aver);
}
}
void Fail(struct student s[], int n) //統計單科不及格人數
{
int i, fail[4]={0};
for (i=0; i<n; i++)
{
if (s[i].math<60)
{
fail[0]++;
}
if (s[i].english<60)
{
fail[1]++;
}
if (s[i].chinese<60)
{
fail[2]++;
}
if (s[i].program<60)
{
fail[3]++;
}
}
printf("\n不及格信息：\n");
printf("數學不及格的人數為：%d人\n", fail[0]);
printf("英語不及格的人數為：%d人\n", fail[1]);
printf("語文不及格的人數為：%d人\n", fail[2]);
printf("程序不及格的人數為：%d人\n", fail[3]);
}
void Max(struct student s[], int n) //統計單科最高分人數
{
int i, counter[4]={0};
double max[4]={s[0].math, s[0].english, s[0].chinese, s[0].program};
for (i=0; i<n; i++)
{
if (s[i].math>max[0])
{
max[0]=s[i].math;
}
if (s[i].math>max[1])
{
max[1]=s[i].math;
}
if (s[i].math>max[2])
{
max[2]=s[i].math;
}
if (s[i].math>max[3])
{
max[3]=s[i].math;
}
}
for (i=0; i<n; i++)
{
if (s[i].math==max[0])
{
counter[0]++;
}
if (s[i].math==max[1])
{
counter[1]++;
}
if (s[i].math==max[2])
{
counter[2]++;
}
if (s[i].math==max[3])
{
counter[3]++;
}
}
printf("\n最高分信息：\n");
printf("數學最高分為：%.1lf, 人數為：%d人\n", max[0], counter[0]);
printf("英語最高分為：%.1lf, 人數為：%d人\n", max[1], counter[1]);
printf("語文最高分為：%.1lf, 人數為：%d人\n", max[2], counter[2]);
printf("程序最高分為：%.1lf, 人數為：%d人\n", max[3], counter[3]);
}
void Min(struct student s[], int n) //統計單科最低分人數
{
int i, counter[4]={0};
double min[4]={s[0].math, s[0].english, s[0].chinese, s[0].program};
for (i=0; i<n; i++)
{
if (s[i].math<min[0])
{
min[0]=s[i].math;
}
if (s[i].math<min[1])
{
min[1]=s[i].math;
}
if (s[i].math<min[2])
{
min[2]=s[i].math;
}
if (s[i].math<min[3])
{
min[3]=s[i].math;
}
}
for (i=0; i<n; i++)
{
if (s[i].math==min[0])
{
counter[0]++;
}
if (s[i].math==min[1])
{
counter[1]++;
}
if (s[i].math==min[2])
{
counter[2]++;
}
if (s[i].math==min[3])
{
counter[3]++;
}
}
printf("\n最低分信息：\n");
printf("數學最低分為：%.1lf, 人數為：%d人\n", min[0], counter[0]);
printf("英語最低分為：%.1lf, 人數為：%d人\n", min[1], counter[1]);
printf("語文最低分為：%.1lf, 人數為：%d人\n", min[2], counter[2]);
printf("程序最低分為：%.1lf, 人數為：%d人\n", min[3], counter[3]);
}
void tongji(struct student s[], int n) //統計函數
{
printf("統計信息如下：\n");
printf("\n姓名\t\t學號\t\t總分\t平均分\n");
allAndAver(s, n);
Max(s, n);
Min(s, n) ;
Fail(s, n);
}
int main() //主函數
{
int k, n=0;
ru(s, &n);
chu(s, n);
while (1)
{
head();
printf("\n請按對應的鍵選擇相應的功能:");
scanf("%d",&k);
switch (k)
{
case 1:
shuru(s, &n);
break;
case 2:
tongji(s, n);
break;
case 3:
dayin(s, n);
break;
case 4:
chazhao(s, n);
break;
case 5:
paixu(s, n);
break;
case 6:
shanchu(s, &n);
break;
case 0:
exit(1);
break;
default : printf("請輸入正確的命令!\n");
}
system("pause");
system("cls");
}
return 0;
}
❷ c語言學生成績管理系統
#include "stdio.h"
#include "stdlib.h"
#include "string.h"
int shoudsave=0; /* */
struct student
{
char num[10];/* 學號 */
char name[20];
char sex[4];
int cgrade;
int mgrade;
int egrade;
int totle;
int ave;
char neartime[10];/* 最近更新時間 */
};
typedef struct node
{
struct student data;
struct node *next;
}Node,*Link;
void menu()
{
printf("********************************************************************************");
printf("\t1登記學生資料\t\t\t\t\t2刪除學生資料\n");
printf("\t3查詢學生資料\t\t\t\t\t4修改學生資料\n");
printf("\t5保存學生資料\t\t\t\t\t0退出系統\n");
printf("********************************************************************************\n");
}
void printstart()
{
printf("-----------------------------------------------------------------------\n");
}
void Wrong()
{
printf("\n=====>提示:輸入錯誤!\n");
}
void Nofind()
{
printf("\n=====>提示:沒有找到該學生!\n");
}
void printc() /* 本函數用於輸出中文 */
{
printf(" 學號\t 姓名 性別 英語成績 數學成績 C語言成績 總分 平均分\n");
}
void printe(Node *p)/* 本函數用於輸出英文 */
{
printf("%-12s%s\t%s\t%d\t%d\t%d\t %d\t %d\n",p->data.num,p->data.name,p->data.sex,p->data.egrade,p->data.mgrade,p->data.cgrade,p->data.totle,p->data.ave);
}
Node* Locate(Link l,char findmess[],char nameornum[]) /* 該函數用於定位連表中符合要求的接點，並返回該指針 */
{
Node *r;
if(strcmp(nameornum,"num")==0) /* 按學號查詢 */
{
r=l->next;
while(r!=NULL)
{
if(strcmp(r->data.num,findmess)==0)
return r;
r=r->next;
}
}
else if(strcmp(nameornum,"name")==0) /* 按姓名查詢 */
{
r=l->next;
while(r!=NULL)
{
if(strcmp(r->data.name,findmess)==0)
return r;
r=r->next;
}
}
return 0;
}
void Add(Link l) /* 增加學生 */
{
Node *p,*r,*s;
char num[10];
r=l;
s=l->next;
while(r->next!=NULL)
r=r->next; /* 將指針置於最末尾 */
while(1)
{
printf("請你輸入學號(以'0'返回上一級菜單:)");
scanf("%s",num);
if(strcmp(num,"0")==0)
break;
while(s)
{
if(strcmp(s->data.num,num)==0)
{
printf("=====>提示:學號為'%s'的學生已經存在,若要修改請你選擇'4 修改'!\n",num);
printstart();
printc();
printe(s);
printstart();
printf("\n");
return;
}
s=s->next;
}
p=(Node *)malloc(sizeof(Node));
strcpy(p->data.num,num);
printf("請你輸入姓名:");
scanf("%s",p->data.name);
getchar();
printf("請你輸入性別:");
scanf("%s",p->data.sex);
getchar();
printf("請你輸入c語言成績:");
scanf("%d",&p->data.cgrade);
getchar();
printf("請你輸入數學成績:");
scanf("%d",&p->data.mgrade);
getchar();
printf("請你輸入英語成績:");
scanf("%d",&p->data.egrade);
getchar();
p->data.totle=p->data.egrade+p->data.cgrade+p->data.mgrade;
p->data.ave=p->data.totle / 3;
/* 信息輸入已經完成 */
p->next=NULL;
r->next=p;
r=p;
shoudsave=1;
}
}
void Qur(Link l) /* 查詢學生 */
{
int sel;
char findmess[20];
Node *p;
if(!l->next)
{
printf("\n=====>提示:沒有資料可以查詢!\n");
return;
}
printf("\n=====>1按學號查找\n=====>2按姓名查找\n");
scanf("%d",&sel);
if(sel==1)/* 學號 */
{
printf("請你輸入要查找的學號:");
scanf("%s",findmess);
p=Locate(l,findmess,"num");
if(p)
{
printf("\t\t\t\t查找結果\n");
printstart();
printc();
printe(p);
printstart();
}
else
Nofind();
}
else if(sel==2) /* 姓名 */
{
printf("請你輸入要查找的姓名:");
scanf("%s",findmess);
p=Locate(l,findmess,"name");
if(p)
{
printf("\t\t\t\t查找結果\n");
printstart();
printc();
printe(p);
printstart();
}
else
Nofind();
}
else
Wrong();
}
void Del(Link l) /* 刪除 */
{
int sel;
Node *p,*r;
char findmess[20];
if(!l->next)
{
printf("\n=====>提示:沒有資料可以刪除!\n");
return;
}
printf("\n=====>1按學號刪除\n=====>2按姓名刪除\n");
scanf("%d",&sel);
if(sel==1)
{
printf("請你輸入要刪除的學號:");
scanf("%s",findmess);
p=Locate(l,findmess,"num");
if(p)
{
r=l;
while(r->next!=p)
r=r->next;
r->next=p->next;
free(p);
printf("\n=====>提示:該學生已經成功刪除!\n");
shoudsave=1;
}
else
Nofind();
}
else if(sel==2)
{
printf("請你輸入要刪除的姓名:");
scanf("%s",findmess);
p=Locate(l,findmess,"name");
if(p)
{
r=l;
while(r->next!=p)
r=r->next;
r->next=p->next;
free(p);
printf("\n=====>提示:該學生已經成功刪除!\n");
shoudsave=1;
}
else
Nofind();
}
else
Wrong();
}
void Modify(Link l)
{
Node *p;
char findmess[20];
if(!l->next)
{
printf("\n=====>提示:沒有資料可以修改!\n");
return;
}
printf("請你輸入要修改的學生學號:");
scanf("%s",findmess);
p=Locate(l,findmess,"num");
if(p)
{
printf("請你輸入新學號(原來是%s):",p->data.num);
scanf("%s",p->data.num);
printf("請你輸入新姓名(原來是%s):",p->data.name);
scanf("%s",p->data.name);
getchar();
printf("請你輸入新性別(原來是%s):",p->data.sex);
scanf("%s",p->data.sex);
printf("請你輸入新的c語言成績(原來是%d分):",p->data.cgrade);
scanf("%d",&p->data.cgrade);
getchar();
printf("請你輸入新的數學成績(原來是%d分):",p->data.mgrade);
scanf("%d",&p->data.mgrade);
getchar();
printf("請你輸入新的英語成績(原來是%d分):",p->data.egrade);
scanf("%d",&p->data.egrade);
p->data.totle=p->data.egrade+p->data.cgrade+p->data.mgrade;
p->data.ave=p->data.totle/3;
printf("\n=====>提示:資料修改成功!\n");
shoudsave=1;
}
else
Nofind();
}
void Disp(Link l)
{
int count=0;
Node *p;
p=l->next;
if(!p)
{
printf("\n=====>提示:沒有資料可以顯示!\n");
return;
}
printf("\t\t\t\t顯示結果\n");
printstart();
printc();
printf("\n");
while(p)
{
printe(p);
p=p->next;
}
printstart();
printf("\n");
}
void Tongji(Link l)
{
Node *pm,*pe,*pc,*pt,*pa; /* 用於指向分數最高的接點 */
Node *r=l->next;
if(!r)
{
printf("\n=====>提示:沒有資料可以統計!\n");
return ;
}
pm=pe=pc=pt=pa=r;
while(r!=NULL)
{
if(r->data.cgrade>=pc->data.cgrade)
pc=r;
if(r->data.mgrade>=pm->data.mgrade)
pm=r;
if(r->data.egrade>=pe->data.egrade)
pe=r;
if(r->data.totle>=pt->data.totle)
pt=r;
if(r->data.ave>=pa->data.ave)
pa=r;
r=r->next;
}
printf("------------------------------統計結果--------------------------------\n");
printf("總分最高者:\t%s %d分\n",pt->data.name,pt->data.totle);
printf("平均分最高者:\t%s %d分\n",pa->data.name,pa->data.ave);
printf("英語最高者:\t%s %d分\n",pe->data.name,pe->data.egrade);
printf("數學最高者:\t%s %d分\n",pm->data.name,pm->data.mgrade);
printf("c語言最高者:\t%s %d分\n",pc->data.name,pc->data.cgrade);
printstart();
}
void Sort(Link l)
{
Link ll;
Node *p,*rr,*s;
ll=(Link)malloc(sizeof(Node)); /* 用於做新的連表 */
ll->next=NULL;
if(l->next==NULL)
{
printf("\n=====>提示:沒有資料可以排序!\n");
return ;
}
p=l->next;
while(p)
{
s=(Node*)malloc(sizeof(Node)); /* 新建接點用於保存信息 */
s->data=p->data;
s->next=NULL;
rr=ll;
while(rr->next!=NULL && rr->next->data.totle>=p->data.totle)
rr=rr->next;
if(rr->next==NULL)
rr->next=s;
else
{
s->next=rr->next;
rr->next=s;
}
p=p->next;
}
free(l);
l->next=ll->next;
printf("\n=====>提示:排序已經完成!\n");
}
void Save(Link l)
{
FILE* fp;
Node *p;
int flag=1,count=0;
fp=fopen("c:\\student","wb");
if(fp==NULL)
{
printf("\n=====>提示:重新打開文件時發生錯誤!\n");
exit(1);
}
p=l->next;
while(p)
{
if(fwrite(p,sizeof(Node),1,fp)==1)
{
p=p->next;
count++;
}
else
{
flag=0;
break;
}
}
if(flag)
{
printf("\n=====>提示:文件保存成功.(有%d條記錄已經保存.)\n",count);
shoudsave=0;
}
fclose(fp);
}
void main()
{
Link l;/* 連表 */
FILE *fp; /* 文件指針 */
int sel;
char ch;
char jian;
int count=0;
Node *p,*r;
printf("\t\t\t\t學生成績管理系統\n\t\t\t\t-------西京學院本科部機制0502 彭琛(41號)\n");
l=(Node*)malloc(sizeof(Node));
l->next=NULL;
r=l;
fp=fopen("C:\\student","rb");
if(fp==NULL)
{
printf("\n=====>提示:文件還不存在，是否創建？(y/n)\n");
scanf("%c",&jian);
if(jian=='y'||jian=='Y')
fp=fopen("C:\\student","wb");
else
exit(0);
}
printf("\n=====>提示:文件已經打開,正在導入記錄......\n");
while(!feof(fp))
{
p=(Node*)malloc(sizeof(Node));
if(fread(p,sizeof(Node),1,fp)) /* 將文件的內容放入接點中 */
{
p->next=NULL;
r->next=p;
r=p; /* 將該接點掛入連中 */
count++;
}
}
fclose(fp); /* 關閉文件 */
printf("\n=====>提示:記錄導入完畢,共導入%d條記錄.\n",count);
while(1)
{
menu();
printf("請你選擇操作:");
scanf("%d",&sel);
if(sel==0)
{
if(shoudsave==1)
{ getchar();
printf("\n=====>提示:資料已經改動,是否將改動保存到文件中(y/n)?\n");
scanf("%c",&ch);
if(ch=='y'||ch=='Y')
Save(l);
}
printf("\n=====>提示:你已經退出系統,再見!\n");
break;
}
switch(sel)
{
case 1:Add(l);break; /* 增加學生 */
case 2:Del(l);break;/* 刪除學生 */
case 3:Qur(l);break;/* 查詢學生 */
case 4:Modify(l);break;/* 修改學生 */
case 5:Save(l);break;/* 保存學生 */
case 9:printf("\t\t\t==========幫助信息==========\n");break;
default: Wrong();getchar();break;
}
}
}
/* */
❸ c語言：學生成績簡單管理程序
給你一個模板吧：
#include"stdio.h"
#include"stdlib.h"
#include"string.h"
#include<conio.h>
#include<malloc.h>
typedef struct list
{
char name[20];
char num[12];
char telephone[12];
int score;
struct list *next;
}list,*lnode;
lnode init()
{
lnode L=(lnode)malloc(sizeof(list));
L->next=NULL;
return L;
}
lnode clear(lnode L)
{
L->next=NULL;
return L;
}
lnode insert(lnode L,char name[],char num[],char telephone[],int score)
{
lnode p,q=L;
p=(lnode)malloc(sizeof(list));
p->next=NULL;
strcpy(p->name,name);
strcpy(p->num,num);
strcpy(p->telephone,telephone);
p->score=score;
if(q->next==NULL)
q->next=p;
else
{
while(q->next!=NULL)
{
q=q->next;
}
q->next=p;
}
return L;
}
void scan()
{
printf("\t\t\t****歡迎使用學生通訊錄***\t\t\t\n\n");
printf("\t\t\t%c 1: 插入聯系人\t%c\n\n",5,5);
printf("\t\t\t%c 2:刪除聯系人\t\t%c\n\n",5,5);
printf("\t\t\t%c 3:顯示所有聯系人\t%c\n\n",5,5);
printf("\t\t\t%c 4:查找聯系人\t\t%c\n\n",5,5);
printf("\t\t\t%c 5:清空\t\t%c\n\n",5,5);
printf("\t\t\t%c 6:保存為文本文件\t%c\n\n",5,5);
printf("\t\t\t%c 其他鍵退出\t\t%c\n\n",5,5);
printf("\t\t\t******按0顯示主菜單******\t\t\t\n");
}
void search(lnode L)
{
lnode p=L;
int n=0;
char a[20];
if(p->next!=NULL)
{
printf("請選擇：\n");
printf("1:按姓名查找\t\t\t2:按學號查找\n");
scanf("%d",&n);
switch(n)
{
case 1:
printf("請輸入姓名\n");
scanf("%s",a);
while(strcmp(p->name,a)!=0&&p->next!=NULL)
{
p=p->next;
}
if(strcmp(p->name,a)==0){
printf("fp","姓名\t學號\t電話\t學分\n");
printf("%s\t%s\t%s\t%d",p->name,p->num,p->telephone,p->score);
}
else
{
printf("未找到聯系人");
}
break;
case 2:
printf("請輸入學號\n");
scanf("%s",a);
while(strcmp(p->num,a)!=0&&p->next!=NULL)
{
p=p->next;
}
if(strcmp(p->num,a)==0){
printf("姓名\t學號\t電話\t學分");
printf("%s\t%s\t%s\t%d",p->name,p->num,p->telephone,p->score);
}
else
{
printf("未找到聯系人");
}
break;
default:
n=0;
break;
}
}
else
printf("通訊錄為空，請插入\n");
}
lnode deletel(lnode L)
{
int n=0;
char a[20];
lnode p=L,pre=NULL;
if(p->next!=NULL)
{
printf("請選擇:/n1:姓名刪除\t2:按學號刪除\t");
scanf("%d",&n);
switch(n)
{
case 1:
p=L;
printf("請輸入姓名");
scanf("%s",a);
while(strcmp(p->name,a)!=0&&p->next!=NULL)
{
pre=p;
p=p->next;
}
if(strcmp(p->name,a)==0)
{
pre->next=p->next;
free(p);
printf("刪除成功\n請選擇\n");
return L;
break;
}
else
printf("未找到此聯系人");
return L;
break;
case 2:
printf("請輸入學號");
scanf("%s",a);
p=L;
while(strcmp(p->num,a)!=0&&p->next!=NULL)
{
pre=p;
p=p->next;
}
if(strcmp(p->num,a)==0)
{
pre->next=p->next;
free(p);
printf("刪除成功\n請選擇\n");
return L;
break;
}
else
printf("未找到此聯系人\n");
return L;
break;
}
}
else
printf("通訊錄為空\n");
return L;
}
void display(lnode L)
{
lnode p=L;
if(p->next==NULL)
printf("未插入聯系人\n");
else
{
for(p=L->next;p!=NULL;p=p->next)
{
printf("姓名\t學號\t電話\t學分\n");
printf("%s\t%s\t%s\t%d\n",p->name,p->num,p->telephone,p->score);
if(p->next==NULL) break;
}
}
}
void save(lnode L)
{
FILE *fp;
lnode p=L;
if((fp=fopen("學生信息管理.txt","w+"))==NULL)
printf("文件打開失敗\n");
else
{
if(p->next!=NULL)
{
for(p=L->next;p!=NULL;p=p->next)
{
fprintf(fp,"姓名\t學號\t電話\t學分\n");
fprintf(fp,"%s\t%s\t%s\t%d",p->name,p->num,p->telephone,p->score);
}
if(p==NULL)
printf("文件保存成功");
}
else
printf("通訊錄為空\n");
}
fclose(fp);
}
void main()
{
int n,score,k=1;
char name[20],num[20],telephone[20];
lnode L;
L=init();
printf("\t\t\t****歡迎使用學生通訊錄***\t\t\t\n\n");
printf("\t\t\t%c 1: 插入聯系人\t%c\n\n",5,5);
printf("\t\t\t%c 2:刪除聯系人\t\t%c\n\n",5,5);
printf("\t\t\t%c 3:顯示所有聯系人\t%c\n\n",5,5);
printf("\t\t\t%c 4:查找聯系人\t\t%c\n\n",5,5);
printf("\t\t\t%c 5:清空\t\t%c\n\n",5,5);
printf("\t\t\t%c 6:保存為文本文件\t%c\n\n",5,5);
printf("\t\t\t%c 其他鍵退出\t\t%c\n\n",5,5);
printf("\t\t\t******按0顯示主菜單******\t\t\t\n");
while(k)
{ scanf("%d",&n);
switch(n)
{
case 1:
printf("請輸入姓名");
scanf("%s",name);
printf("請輸入學號");
scanf("%s",num);
printf("請輸入電話");
scanf("%s",telephone);
printf("請輸入學分");
scanf("%d",&score);
L=insert(L,name,num,telephone,score);
printf("添加成功,請選擇\n");
break;
case 2:
L=deletel(L);
break;
case 3:
display(L);
break;
case 4:
search(L);
break;
case 5:
L=clear(L);
case 6:
save(L);
break;
case 0:
scan();
break;
default:
k=0;
}
}
printf("************************謝謝使用****************************");
}
❹ c語言 學生成績管理程序
#include<stdio.h>
#include<string.h>
#include<stdlib.h>
struct stu
{
int num;//編號
char name[30];//姓名
char fm[30];//性別
char tel[30];//電話號碼
char dz[30];//地址
int cj;//成績
int sum;//排名
};
int i=0;
int z;
void ss1(struct stu u[]);
void ss2(struct stu u[]);
void ss3(struct stu u[]);
void ss4(struct stu u[]);
void ss5(struct stu u[]);
void ss6(struct stu u[]);
void main()
{
int x;
char m;
struct stu u[40];
printf("---------------歡迎使用通訊錄----------------------\n");
do
{
printf("學號:%d\n",i+1);
u[i].num=i+1;
printf("姓名:\n");
scanf("%s",u[i].name);
printf("性別:\n");
scanf("%s",u[i].fm);
printf("電話號碼:\n");
scanf("%s",u[i].tel);
printf("地址:\n");
scanf("%s",u[i].dz);
printf("成績:\n");
scanf("%d",&u[i].cj);
i++;
printf("是否繼續輸入?(y\\n)");
scanf(" %c",&m);
}while(m=='Y'||m=='y');
do
{
printf("〓 通訊錄 〓\n");
printf("〓 0.退 出 〓\n");
printf("〓 1.查 找 〓\n");
printf("〓 2.添 加 〓\n");
printf("〓 3.刪 除 〓\n");
printf("〓 4.修 改 〓\n");
printf("〓 5.瀏覽信息 〓\n");
printf("〓 6.成績排名 〓\n");
printf("〓〓〓〓〓〓〓〓〓〓〓〓〓\n");
printf("請選擇:\n");
scanf("%d",&x);
switch(x)
{
case 0:exit(0);break;
case 1:ss1(u);break;
case 2:ss2(u);break;
case 3:ss3(u);break;
case 4:ss4(u);break;
case 5:ss5(u);break;
case 6:ss6(u);break;
}
printf("是否選擇其它功能(y\\n)");
scanf(" %c",&m);
}while(m=='Y'||m=='y');
}
void ss1(struct stu u[])
{
char name[20];
int j;
printf("請輸入您要查找的姓名");
scanf("%s",name);
for(j=0;j<i;j++)
{
if(strcmp(u[j].name,name)==0)
break;
}
if(j==i)
printf("查無此人");
else
printf("學號:%d 姓名:%s 電話號碼%s 地址%s 成績%d\n",u[j].num,u[j].name,u[j].tel,u[j].dz,u[j].cj);
}
void ss2(struct stu u[])
{
char m;
do
{
printf("學號:%d\n",z+1);
u[i].num=z+1;
printf("姓名:\n");
scanf("%s",u[i].name);
printf("性別:\n");
scanf("%s",u[i].fm);
printf("電話號碼\n");
scanf("%s",u[i].tel);
printf("地址:\n");
scanf("%s",u[i].dz);
printf("成績:\n");
scanf("%d",&u[i].cj);
z++;
i++;
printf("是否繼續輸入?(y\\n)");
scanf(" %c",&m);
}while(m=='Y'||m=='y');
}
void ss3(struct stu u[])
{
int j,k,num;
printf("請輸入您要刪除的學號");
scanf("%d",&num);
for(j=0;j<i;j++)
{
if(u[j].num==num)
break;
}
if(j==i)
printf("查無此人");
else
{
for(k=j;k<i-1;k++)
{
u[k]=u[k+1];
}
z=i;
i--;
printf("---------------------刪除成功---------------------\n");
}
}
void ss4(struct stu u[])
{
int num,j,k;
char m;
printf("請選擇您要修改的學號:");
scanf("%d",&num);
for(j=0;j<i;j++)
{
if(u[j].num==num)
break;
}
if(j==i)
printf("查無此人");
else
{
do
{
printf("學號:%d\n",num);
u[i].num=num;
for(k=j;k<i-1;k++)
{
u[k]=u[k+1];
}
i--;
printf("姓名:\n");
scanf("%s",u[i].name);
printf("性別:\n");
scanf("%s",u[i].fm);
printf("電話號碼\n");
scanf("%s",u[i].tel);
printf("地址:\n");
scanf("%s",u[i].dz);
printf("成績:\n");
scanf("%d",&u[i].cj);
i++;
printf("-----------------------修改完畢-----------------------\n");
printf("是否繼續輸入?(y\\n)");
scanf(" %c",&m);
}while(m=='Y'||m=='y');
}
}
void ss5(struct stu u[])
{
int j;
for(j=0;j<i;j++)
{
printf("學號:%d 姓名:%s 電話號碼%s 地址%s 成績%d\n",u[j].num,u[j].name,u[j].tel,u[j].dz,u[j].cj);
}
if(i==0)
{
printf("當前沒有信息");
}
}
void ss6(struct stu u[])
{
int j,k,h;
char p[30];
int sum=0;
for(j=0;j<i-1;j++)
{
for(k=j+1;k<i;k++)
{
if(u[j].cj<u[k].cj)
{
h=u[j].cj;
u[j].cj=u[k].cj;
u[k].cj=h;
h=u[j].num;
u[j].num=u[k].num;
u[k].num=h;
strcpy(p,u[j].name);
strcpy(u[j].name,u[k].name);
strcpy(u[k].name,p);
strcpy(p,u[j].tel);
strcpy(u[j].tel,u[k].tel);
strcpy(u[k].tel,p);
strcpy(p,u[j].dz);
strcpy(u[j].dz,u[k].dz);
strcpy(u[k].dz,p);
}
}
}
for(j=0;j<i;j++)
{
printf("排名:%d學號:%d 姓名:%s 電話號碼%s 地址%s 成績%d\n",sum+1,u[j].num,u[j].name,u[j].tel,u[j].dz,u[j].cj);
sum++;
}
}
❺ c語言 學生成績管理
||#include<stdio.h>
#include<string.h>
#include<stdlib.h>
#include<conio.h>
struct student
{ char num[10];
char name[20];
char sex[5];
float grade[3];
float v;
float sum;
}stu[50];
int k=0;
void input();
void display();
void lookandchange();
void average();
void paixu();
void save();
void main()
{
int a;
do
{
printf("\n\n ******************************************************************\n");
printf(" *"); printf("\t\twelcome enter the student management system"); printf("\t*");
printf("\n ******************************************************************\n");
printf(" *"); printf("\t 1.Access student information"); printf("\t\t\t\t*\n");
printf(" *"); printf("\t 2.Display student information"); printf("\t\t\t\t*\n");
printf(" *"); printf("\t 3.LookandChange student information"); printf("\t\t\t*\n");
printf(" *"); printf("\t 4.By sum Sort student information and output"); printf("\t\t*\n");
printf(" *"); printf("\t 5.save the student information"); printf("\t\t\t*\n");
printf(" *"); printf("\t 6. exit "); printf("\t\t\t\t\t*\n");
printf(" ******************************************************************\n");
printf(" Enter you choice : ");
scanf("%d",&a);
switch(a)
{
case 1:printf("\n");input();break;
case 2:printf("\n");display();break;
case 3:printf("\n");lookandchange();break;
case 4:printf("\n");paixu();break;
case 5:printf("\n");save();break;
case 6:printf("\n");exit(0);break;
default:printf("\nThe choice is between 1 to 6.\n");
}
}while(a!=0);
}
void input()
{ int j;
char ch[20];
printf("\nenter student information:\n");
do
{ printf("\nnum: ");
scanf("%s",stu[k].num);
printf("\nname: ");
scanf("%s",stu[k].name);
printf("\nsex: ");
scanf("%s",stu[k].sex);
for(j=0;j<3;j++)
{ printf("\ngrade%d: ",j+1);
scanf("%f",&stu[k].grade[j]); }
k++;
printf("\nif want continue input student information(y/n): ");
scanf("%s",ch);
}while(strcmp(ch,"y")==0||strcmp(ch,"Y")==0);
average();
display();
}
void display()
{ int i;
printf(" the student information is:\n");
for(i=0;i<k;i++)
{ printf("%-10s %-10s %-5s %.2f %.2f %.2f %8f %8f\n",stu[i].num,stu[i].name,stu[i].sex,stu[i].grade[0],stu[i].grade[1],stu[i].grade[2],stu[i].sum,stu[i].v);
printf("\n"); }
}
void average()
{ int i,j;
for(i=0;i<k;i++)
{ stu[i].sum=0;
for(j=0;j<3;j++)
stu[i].sum=stu[i].sum+stu[i].grade[j] ;
stu[i].v=stu[i].sum/5; }
}
void lookandchange()
{ int pass[4]; int i,j,l,flag;
char a[20],ch[10],c[20];
printf("This is a database management system:\n");
for(l=0;l<3;l++)
{ flag=0;
printf(" please enter the password: ");
scanf("%1d%1d%1d%1d",&pass[0],&pass[1],&pass[2],&pass[3]);
for(i=0;i<4;i++)
if(pass[i]==i+1) flag=flag+1;
if(flag==4)
{ printf("\nenter you want look student num:");
scanf("%s",a);
for(i=0;i<k;i++)
if(strcmp(stu[i].num,a)==0) printf("%-10s %-10s %-5s %.2f %.2f %.2f %8f %8f\n",stu[i].num,stu[i].name,stu[i].sex,stu[i].grade[0],stu[i].grade[1],stu[i].grade[2],stu[i].sum,stu[i].v);
printf("\nenter you want look student name:");
scanf("%s",a);
for(i=0;i<k;i++)
if(strcmp(stu[i].name,a)==0) printf("%-10s %-10s %-5s %.2f %.2f %.2f %8f %8f\n",stu[i].num,stu[i].name,stu[i].sex,stu[i].grade[0],stu[i].grade[1],stu[i].grade[2],stu[i].sum,stu[i].v);
printf("\nenter you want change student num:");
scanf("%s",a);
for(i=0;i<k;i++)
{
if(strcmp(stu[i].num,a)==0)
{ printf("\nyou sure want change student num(y/n): ");
scanf("%s",ch);
if(strcmp(ch,"y")==0||strcmp(ch,"Y")==0)
printf("\nyou sure want change student name(y/n): ");
scanf("%s",ch);
if(strcmp(ch,"y")==0||strcmp(ch,"Y")==0)
printf("\nyou sure want change student sex(y/n): ");
scanf("%s",ch);
if(strcmp(ch,"y")==0||strcmp(ch,"Y")==0)
printf("\nyou sure want change student grade(y/n): ");
scanf("%s",ch);
if(strcmp(ch,"y")==0||strcmp(ch,"Y")==0)
for(j=0;j<3;j++)
stu[i].sum=0;
for(j=0;j<5;j++)
stu[i].sum=stu[i].sum+stu[i].grade[j] ;
stu[i].v=stu[i].sum/5;
}
} printf("\nyou sure want delete student information(y/n): ");
scanf("%s",ch);
if(strcmp(ch,"y")==0||strcmp(ch,"Y")==0)
{ printf("\nenter you want delete num ：\n");
printf("num：");
scanf("%s",&c);
for(i=0;i<k;i++)
if(strcmp(c,stu[i].num)==0) break;
for(j=i;j<=2;j++)
stu[j]=stu[j+1];
printf("\t\t\tyou had delete %s\n",c);
k--; }
}
else printf("\nyou enter password is wrong.\n"); }
display();
}
void paixu()
{ struct student temp;
int i,j;
for(i=0;i<k-1;i++)
{
for(j=i+1;j<k;j++)
{
if(stu[i].sum<stu[j].sum)
{
temp=stu[i];
stu[i]=stu[j];
stu[j]=temp;
}
} }
display();
}
void save()
{ FILE *fp; int i;
if((fp=fopen("xinxi.txt","w"))==NULL)
{ printf("cannot write the file.\n");
exit(0);}
for(i=0;strlen(stu[i].num)!=0;i++)
fprintf(fp,"%-10s %-10s %-5s %.2f %.2f %.2f %8f %8f\n",stu[i].num,stu[i].name,stu[i].sex,stu[i].grade[0],stu[i].grade[1],stu[i].grade[2],stu[i].sum,stu[i].v);
fclose(fp);
}
進入修改數據的密碼是1234 你有三次機會輸入密碼
在vc++中調試成功 有問題hi我
❻ 學生成績管理（C語言）
#include<stdio.h> /*引用庫函數*/
#include<stdlib.h>
#include<ctype.h>
#include<string.h>
typedef struct /*定義結構體數組*/
{
char num[10]; /*學號*/
char name[20]; /*姓名*/
int score; /*成績*/
}Student;
Student stu[80]; /*結構體數組變數*/
int menu_select() /*菜單函數*/
{
char c;
do{
system("cls"); /*運行前清屏*/
printf("\t\t****Students' Grade Management System****\n"); /*菜單選擇*/
printf("\t\t | 1. Input Records |\n");
printf("\t\t | 2. Display All Records |\n");
printf("\t\t | 3. Sort |\n");
printf("\t\t | 4. Insert a Record |\n");
printf("\t\t | 5. Delete a Record |\n");
printf("\t\t | 6. Query |\n");
printf("\t\t | 7. Statistic |\n");
printf("\t\t | 8. Add Records from a Text File|\n");
printf("\t\t | 9. Write to a Text file |\n");
printf("\t\t | 0. Quit |\n");
printf("\t\t*****************************************\n");
printf("\t\t\tGive your Choice(0-9):");
c=getchar(); /*讀入選擇*/
}while(c<'0'||c>'9');
return(c-'0'); /*返回選擇*/
}
int Input(Student stud[],int n) /*輸入若干條記錄*/
{int i=0;
char sign,x[10]; /*x[10]為清除多餘的數據所用*/
while(sign!='n'&&sign!='N') /*判斷*/
{ printf("\t\t\tstudent's num:"); /*交互輸入*/
scanf("\t\t\t%s",stud[n+i].num);
printf("\t\t\tstudent's name:");
scanf("\t\t\t%s",stud[n+i].name);
printf("\t\t\tstudent's score:");
scanf("\t\t\t%d",&stud[n+i].score);
gets(x); /*清除多餘的輸入*/
printf("\t\t\tany more records?(Y/N)");
scanf("\t\t\t%c",&sign); /*輸入判斷*/
i++;
}
return(n+i);
}
void Display(Student stud[],int n) /*顯示所有記錄*/
{
int i;
printf("\t\t\t-----------------------------------\n"); /*格式頭*/
printf("\t\t\tnumber name score\n");
printf("\t\t\t-----------------------------------\n");
for(i=1;i<n+1;i++) /*循環輸入*/
{
printf("\t\t\t%-16s%-15s%d\n",stud[i-1].num,stud[i-1].name,stud[i-1].score);
if(i>1&&i%10==0) /*每十個暫停*/
{printf("\t\t\t-----------------------------------\n"); /*格式*/
printf("\t\t\t");
system("pause");
printf("\t\t\t-----------------------------------\n");
}
}
printf("\t\t\t");
system("pause");
}
void Sort_by_num(Student stud[],int n) /*按學號排序*/
{ int i,j,*p,*q,s;
char t[10];
for(i=0;i<n-1;i++) /*冒泡法排序*/
for(j=0;j<n-1-i;j++)
if(strcmp(stud[j].num,stud[j+1].num)>0)
{strcpy(t,stud[j+1].num);
strcpy(stud[j+1].num,stud[j].num);
strcpy(stud[j].num,t);
strcpy(t,stud[j+1].name);
strcpy(stud[j+1].name,stud[j].name);
strcpy(stud[j].name,t);
p=&stud[j+1].score;
q=&stud[j].score;
s=*p;
*p=*q;
*q=s;
}
}
int Insert_a_record(Student stud[],int n) /*插入一條記錄*/
{char x[10]; /*清除多餘輸入所用*/
printf("\t\t\tstudent's num:"); /*互動式輸入*/
scanf("\t\t\t%s",stud[n].num);
printf("\t\t\tstudent's name:");
scanf("\t\t\t%s",stud[n].name);
printf("\t\t\tstudent's score:");
scanf("\t\t\t%d",&stud[n].score);
gets(x);
n++;
Sort_by_num(stud,n); /*調用排序函數*/
printf("\t\t\tInsert Successed!\n"); /*返回成功信息*/
return(n);
}
int Delete_a_record(Student stud[],int n) /*按姓名查找，刪除一條記錄*/
{ char s[20];
int i=0,j;
printf("\t\t\ttell me his(her) name:"); /*互動式問尋*/
scanf("%s",s);
while(strcmp(stud[i].name,s)!=0&&i<n) i++; /*查找判斷*/
if(i==n)
{ printf("\t\t\tnot find!\n"); /*返回失敗信息*/
return(n);
}
for(j=i;j<n-1;j++) /*刪除操作*/
{
strcpy(stud[j].num,stud[j+1].num);
strcpy(stud[j].name,stud[j+1].name);
stud[j].score=stud[j+1].score;
}
printf("\t\t\tDelete Successed!\n"); /*返回成功信息*/
return(n-1);
}
void Query_a_record(Student stud[],int n) /*查找並顯示一個記錄*/
{ char s[20];
int i=0;
printf("\t\t\tinput his(her) name:"); /*互動式輸入*/
scanf("\t\t\t%s",s);
while(strcmp(stud[i].name,s)!=0&&i<n) i++; /*查找判斷*/
if(i==n)
{ printf("\t\t\tnot find!\n"); /*輸入失敗信息*/
return;
}
printf("\t\t\this(her) number:%s\n",stud[i].num); /*輸出該學生信息*/
printf("\t\t\this(her) score:%d\n",stud[i].score);
}
void Statistic(Student stud[],int n) /*新增功能，輸出統計信息*/
{ int i,j=0,k=0,sum=0;
float aver; /*成績平均值*/
for(i=0;i<n;i++) /*循環輸入判斷*/
{
sum+=stud[i].score;
if(stud[j].score>stud[i].score) j=i;
if(stud[k].score<stud[i].score) k=i;
}
aver=1.0*sum/n;
printf("\t\t\tthere are %d records.\n",n); /*總共記錄數*/
printf("\t\t\tthe hignest score:\n"); /*最高分*/
printf("\t\t\tnumber:%s name:%s score:%d\n",stud[j].num,stud[j].name,stud[j].score);
printf("\t\t\tthe lowest score:\n"); /*最低分*/
printf("\t\t\tnumber:%s name:%s score:%d\n",stud[k].num,stud[k].name,stud[k].score);
printf("\t\t\tthe average score is %5.2f\n",aver); /*平均分*/
}
int AddfromText(Student stud[],int n) /*從文件中讀入數據*/
{ int i=0,num;
FILE *fp; /*定義文件指針*/
char filename[20]; /*定義文件名*/
printf("\t\t\tInput the filename:");
scanf("\t\t\t%s",filename); /*輸入文件名*/
if((fp=fopen(filename,"rb"))==NULL) /*打開文件*/
{ printf("\t\t\tcann't open the file\n"); /*打開失敗信息*/
printf("\t\t\t");
system("pause");
return(n);
}
fscanf(fp,"%d",&num); /*讀入總記錄量*/
while(i<num) /*循環讀入數據*/
{
fscanf(fp,"%s%s%d",stud[n+i].num,stud[n+i].name,&stud[n+i].score);
i++;
}
n+=num;
fclose(fp); /*關閉文件*/
printf("\t\t\tSuccessed!\n");
printf("\t\t\t");
system("pause");
return(n);
}
void WritetoText(Student stud[],int n) /*將所有記錄寫入文件*/
{
int i=0;
FILE *fp; /*定義文件指針*/
char filename[20]; /*定義文件名*/
printf("\t\t\tWrite Records to a Text File\n"); /*輸入文件名*/
printf("\t\t\tInput the filename:");
scanf("\t\t\t%s",filename);
if((fp=fopen(filename,"w"))==NULL) /*打開文件*/
{
printf("\t\t\tcann't open the file\n");
system("pause");
return;
}
fprintf(fp,"%d\n",n); /*循環寫入數據*/
while(i<n)
{
fprintf(fp,"%-16s%-15s%d\n",stud[i].num,stud[i].name,stud[i].score);
i++;
}
fclose(fp); /*關閉文件*/
printf("Successed!\n"); /*返回成功信息*/
}
void main() /*主函數*/
{
int n=0;
for(;;)
{
switch(menu_select()) /*選擇判斷*/
{
case 1:
printf("\t\t\tInput Records\n"); /*輸入若干條記錄*/
n=Input(stu,n);
break;
case 2:
printf("\t\t\tDisplay All Records\n"); /*顯示所有記錄*/
Display(stu,n);
break;
case 3:
printf("\t\t\tSort\n");
Sort_by_num(stu,n); /*按學號排序*/
printf("\t\t\tSort Suceessed!\n");
printf("\t\t\t");
system("pause");
break;
case 4:
printf("\t\t\tInsert a Record\n");
n=Insert_a_record(stu,n); /*插入一條記錄*/
printf("\t\t\t");
system("pause");
break;
case 5:
printf("\t\t\tDelete a Record\n");
n=Delete_a_record(stu,n); /*按姓名查找，刪除一條記錄*/
printf("\t\t\t");
system("pause");
break;
case 6:
printf("\t\t\tQuery\n");
Query_a_record(stu,n); /*查找並顯示一個記錄*/
printf("\t\t\t");
system("pause");
break;
case 7:
printf("\t\t\tStatistic\n");
Statistic(stu,n); /*新增功能，輸出統計信息*/
printf("\t\t\t");
system("pause");
break;
case 8:
printf("\t\t\tAdd Records from a Text File\n");
n=AddfromText(stu,n); /*新增功能，輸出統計信息*/
break;
case 9:
printf("\t\t\tWrite to a Text file\n");
WritetoText(stu,n); /*循環寫入數據*/
printf("\t\t\t");
system("pause");
break;
case 0:
printf("\t\t\tHave a Good Luck,Bye-bye!\n"); /*結束程序*/
printf("\t\t\t");
system("pause");
exit(0);
❼ c語言學生成績管理
測試過了
/*頭文件*/
#include <stdio.h>
#include<dos.h>
#include<stdlib.h> /*其它說明*/
#include<string.h> /*字元串函數*/
#include<memory.h> /*內存操作函數*/
#include<ctype.h> /*字元操作函數*/
#include "conio.h"
#define LEN sizeof(STUDENT)
typedef struct stu /*定義結構體數組用於緩存數據*/
{char num[6];
char name[5];
int score[3];
int sum;
float average;
int order;
struct stu *next;
}STUDENT;
/*函數原型*/
STUDENT *init(); /*初始化函數*/
int menu_select(); /*菜單函數*/
STUDENT *create(); /*創建鏈表*/
void print(STUDENT *head); /* 顯示全部記錄*/
void search(STUDENT *head); /*查找記錄*/
STUDENT *mydelete(STUDENT *head); /*刪除記錄*/
STUDENT *sort(STUDENT *head); /*排序*/
STUDENT *insert(STUDENT *head,STUDENT *mynew); /*插入記錄*/
void save(STUDENT *head); /*保存文件*/
STUDENT *load(); /*讀文件*/
/*主函數界面*/
void main()
{STUDENT *head,mynew;
head=init(); /*鏈表初始化,使head的值為NULL*/
for(;;) /*循環無限次*/
{switch(menu_select())
{
case 1:head=create();break;
case 2:print(head);break;
case 3:search(head);break;
case 4:head=mydelete(head);break;
case 5:head=sort(head);break;
case 6:head=insert(head,&mynew);break; /*&mynew表示返回地址*/
case 7:save(head);break;
case 8:head=load(); break;
case 9:exit(0); /*如菜單返回值為9則程序結束*/
}
}
}
/*初始化函數*/
STUDENT *init()
{
return NULL; /*返回空指針*/
}
/*菜單選擇函數*/
menu_select()
{int n;
printf("\n按任一鍵進入主菜單...... \npress any key to enter the menu......"); /*按任一鍵進入主菜單*/
getch(); /*從鍵盤讀取一個字元,但不顯示於屏幕*/
system("cls");
printf("********************************************************************************\n");
printf("\t\t 歡迎 Welcome to\n");
printf("\n\t\t\t 使用學生管理系統1.0\n\n\t\t\t\t\t\n");
printf("*************************************MENU***************************************\n");
printf("\t\t\t1. 輸入學生成績記錄 Enter the record\n"); /*輸入學生成績記錄*/
printf("\t\t\t2. 顯示 Print the record\n"); /*顯示*/
printf("\t\t\t3. 尋找 Search record on name\n"); /*尋找*/
printf("\t\t\t4. 刪除 mydelete a record\n"); /*刪除*/
printf("\t\t\t5. 排序 Sort to make mynew a file\n"); /*排序*/
printf("\t\t\t6. 插入 Insert record to list\n"); /*插入*/
printf("\t\t\t7. 保存 Save the file\n"); /*保存*/
printf("\t\t\t8. 讀取 Load the file\n"); /*讀取*/
printf("\t\t\t9. 退出 Quit\n"); /*退出*/
printf("********************************************************************************\n");
do{
printf("\n\t\t\t輸入你的選擇Enter your choice(1~9):");
scanf("%d",&n);
}while(n<1||n>9); /*如果選擇項不在1~9之間則重輸*/
return(n); /*返回選擇項，主函數根據該數調用相應的函數*/
}
/*輸入函數*/
STUDENT *create()
{int i,s;
STUDENT *head=NULL,*p; /* 定義函數.此函數帶回一個指向鏈表頭的指針*/
system("cls");
for(;;)
{p=(STUDENT *)malloc(LEN); /*開辟一個新的單元*/
if(!p) /*如果指針p為空*/
{printf("\n輸出內存溢出. Out of memory."); /*輸出內存溢出*/
return (head); /*返回頭指針,下同*/
}
printf("輸入學號Enter the num(0:list end):");
scanf("%s",p->num);
if(p->num[0]=='0') break; /*如果學號首字元為0則結束輸入*/
printf("輸入名字Enter the name:");
scanf("%s",p->name);
printf("請輸入3門成績Please enter the %d scores\n",3); /*提示開始輸入成績*/
s=0; /*計算每個學生的總分，初值為0*/
for(i=0;i<3;i++) /*3門課程循環3次*/
{
do{
printf("成績score%d:",i+1);
scanf("%d",&p->score[i]);
if(p->score[i]<0 || p->score[i]>100) /*確保成績在0~100之間*/
printf("數據錯誤,請重新輸入 Data error,please enter again.\n");
}while(p->score[i]<0 || p->score[i]>100);
s=s+p->score[i]; /*累加各門成績*/
}
p->sum=s; /*將總分保存*/
p->average=(float)s/3; /*先用強制類型轉換將s轉換成float型,再求平均值*/
p->order=0; /*未排序前此值為0*/
p->next=head; /*將頭結點做為新輸入結點的後繼結點*/
head=p; /*新輸入結點為新的頭結點*/
}
return(head);
}
/* 顯示全部記錄函數*/
void print(STUDENT *head)
{int i=0; /* 統計記錄條數*/
STUDENT *p; /*移動指針*/
system("cls");
p=head; /*初值為頭指針*/
printf("\n************************************STUDENT************************************\n");
printf("-------------------------------------------------------------------------------\n");
printf("| Rec | Num | Name | Sc1 | Sc2 | Sc3 | Sum | Ave | Order |\n");
printf("-------------------------------------------------------------------------------\n");
while(p!=NULL)
{
i++;
printf("| %3d | %4s | %-4s | %3d | %3d | %3d | %3d | %4.2f | %-5d|\n",
i, p->num,p->name,p->score[0],p->score[1],p->score[2],p->sum,p->average,p->order);
p=p->next;
}
printf("-------------------------------------------------------------------------------\n");
printf("**************************************END**************************************\n");
}
/*查找記錄函數*/
void search(STUDENT *head)
{STUDENT *p; /* 移動指針*/
char s[5]; /*存放姓名用的字元數組*/
system("cls");
printf("請輸入個姓名來查找. Please enter name for searching.\n");
scanf("%s",s);
p=head; /*將頭指針賦給p*/
while(strcmp(p->name,s) && p != NULL) /*當記錄的姓名不是要找的，或指針不為空時*/
p=p->next; /*移動指針，指向下一結點*/
if(p!=NULL) /*如果指針不為空*/
{printf("\n*************************************FOUND************************************\n");
printf("-------------------------------------------------------------------------------\n");
printf("| Num | Name | sc1 | sc2 | sc3 | Sum | Ave | Order |\n");
printf("-------------------------------------------------------------------------------\n");
printf("| %4s | %4s | %3d | %3d | %3d | %3d | %4.2f | %-5d|\n",
p->num,p->name,p->score[0],p->score[1],p->score[2],p->sum,p->average,p->order);
printf("-------------------------------------------------------------------------------\n");
printf("***************************************END**************************************\n");
}
else
printf("\n沒有該學生 There is no num %s student on the list.\n",s); /*顯示沒有該學生*/
}
/*刪除記錄函數*/
STUDENT *mydelete(STUDENT *head)
{int n;
STUDENT *p1,*p2; /*p1為查找到要刪除的結點指針，p2為其前驅指針*/
char c,s[6]; /*s[6]用來存放學號,c用來輸入字母*/
system("cls");
printf("請輸入要刪除的學號 Please enter the mydeleted num: ");
scanf("%s",s);
p1=p2=head; /*給p1和p2賦初值頭指針*/
while(strcmp(p1->num,s) && p1 != NULL) /*當記錄的學號不是要找的，或指針不為空時*/
{p2=p1; /*將p1指針值賦給p2作為p1的前驅指針*/
p1=p1->next; /*將p1指針指向下一條記錄*/
}
if(strcmp(p1->num,s)==0) /*學號找到了*/
{printf("**************************************FOUND************************************\n");
printf("-------------------------------------------------------------------------------\n");
printf("| Num | Name | sc1 | sc2 | sc3 | Sum | Ave | Order |\n");
printf("-------------------------------------------------------------------------------\n");
printf("| %4s | %4s | %3d | %3d | %3d | %3d | %4.2f | %-5d|\n",
p1->num,p1->name,p1->score[0],p1->score[1],p1->score[2],p1->sum,p1->average,p1->order);
printf("-------------------------------------------------------------------------------\n");
printf("***************************************END**************************************\n");
printf("\n是否要刪除,輸入Y刪除,N則退出\nAre you sure to mydelete the student Y/N ?"); /*提示是否要刪除,輸入Y刪除,N則退出*/
for(;;)
{scanf("%c",&c);
if(c=='n'||c=='N') break; /*如果不刪除,則跳出本循環*/
if(c=='y'||c=='Y')
{
if(p1==head) /*若p1==head，說明被刪結點是首結點*/
head=p1->next; /*把第二個結點地址賦予head*/
else
p2->next=p1->next; /*否則將一下結點地址賦給前一結點地址*/
n=n-1;
printf("\n學號為(Num): %s 學生以被刪除(student have been mydeleted.)\n",s);
printf("別忘了保存. Don't forget to save.\n");break; /*刪除後就跳出循環*/
}
}
}
else
printf("\n沒有這個學生在表上\nThere is no num %s student on the list.\n",s); /*找不到該結點*/
return(head);
}
/*排序函數*/
STUDENT *sort(STUDENT *head)
{int i=0; /*保存名次*/
STUDENT *p1,*p2,*t,*temp; /*定義臨時指針*/
temp=head->next; /*將原表的頭指針所指的下一個結點作頭指針*/
head->next=NULL; /*第一個結點為新表的頭結點*/
while(temp!=NULL) /*當原表不為空時，進行排序*/
{
t=temp; /*取原表的頭結點*/
temp=temp->next; /*原表頭結點指針後移*/
p1=head; /*設定移動指針p1，從頭指針開始*/
p2=head; /*設定移動指針p2做為p1的前驅，初值為頭指針*/
while(t->average<p1->average&&p1!=NULL) /*作成績平均分比較*/
{
p2=p1; /*待排序點值小，則新表指針後移*/
p1=p1->next;
}
if(p1==p2) /*p1==p2，說明待排序點值大，應排在首位*/
{
t->next=p1; /*待排序點的後繼為p*/
head=t; /*新頭結點為待排序點*/
}
else /*待排序點應插入在中間某個位置p2和p1之間，如p為空則是尾部*/
{
t->next=p1; /*t的後繼是p1*/
p2->next=t; /*p2的後繼是t*/
}
}
p1=head; /*已排好序的頭指針賦給p1，准備填寫名次*/
while(p1!=NULL) /*當p1不為空時，進行下列操作*/
{
i++; /*結點序號*/
p1->order=i; /*將結點序號賦值給名次*/
p1=p1->next; /*指針後移*/
}
printf("排序成功 Sorting is sucessful.\n"); /*排序成功*/
return (head);
}
/*插入記錄函數*/
STUDENT *insert(STUDENT *head,STUDENT *mynew)
{STUDENT *p0,*p1,*p2;
int n,sum1,i;
p1=head; /*使p1指向第一個結點*/
p0=mynew; /*p0指向要插入的結點*/
printf("\nPlease enter a mynew record.\n"); /*提示輸入記錄信息*/
printf("輸入學號Enter the num:");
scanf("%s",mynew->num);
printf("輸入名字Enter the name:");
scanf("%s",mynew->name);
printf("Please enter the %d scores.\n",3);
sum1=0; /*保存新記錄的總分，初值為0*/
for(i=0;i<3;i++)
{
do{
printf("成績score%d:",i+1);
scanf("%d",&mynew->score[i]);
if(mynew->score[i]>100||mynew->score[i]<0)
printf("數據錯誤Data error,please enter again.\n");
}while(mynew->score[i]>100||mynew->score[i]<0);
sum1=sum1+mynew->score[i]; /*累加各門成績*/
}
mynew->sum=sum1; /*將總分存入新記錄中*/
mynew->average=(float)sum1/3;
mynew->order=0;
if(head==NULL) /*原來的鏈表是空表*/
{head=p0;p0->next=NULL;} /*使p0指向的結點作為頭結點*/
else
{while((p0->average<p1->average)&&(p1->next!=NULL))
{p2=p1; /*使p2指向剛才p1指向的結點*/
p1=p1->next; /*p1後移一個結點*/
}
if(p0->average>=p1->average)
{if(head==p1)head=p0; /*插到原來第一個結點之前*/
else p2->next=p0; /*插到p2指向的結點之後*/
p0->next=p1;}
else
{p1->next=p0;p0->next=NULL;} /*插到最後的結點之後*/
}
n=n+1; /*結點數加1*/
head=sort(head); /*調用排序的函數,將學生成績重新排序*/
printf("\n學生Student %s 已被更新have been inserted.\n",mynew->name);
printf("不要忘了保存Don't forget to save the mynew file.\n");
return(head);
}
/*保存數據到文件函數*/
void save(STUDENT *head)
{FILE *fp; /*定義指向文件的指針*/
STUDENT *p; /* 定義移動指針*/
char outfile[10];
printf("輸出文件例如:c:\\score Enter outfile name,for example c:\\score\n");
scanf("%s",outfile);
if((fp=fopen(outfile,"w"))==NULL) /*為輸出打開一個二進制文件,為只寫方式*/
{
printf("打不開文件Cannot open the file\n");
return; /*若打不開則返回菜單*/
}
printf("\n保存中...Saving the file......\n");
p=head; /*移動指針從頭指針開始*/
while(p!=NULL) /*如p不為空*/
{
fwrite(p,LEN,1,fp); /*寫入一條記錄*/
p=p->next; /*指針後移*/
}
fclose(fp); /*關閉文件*/
printf("保存成功....Save the file successfully!\n");
}
/* 從文件讀數據函數*/
STUDENT *load()
{STUDENT *p1,*p2,*head=NULL; /*定義記錄指針變數*/
FILE *fp; /* 定義指向文件的指針*/
char infile[10];
printf("倒入文件例如:c:\\score Enter infile name,for example c:\\score\n");
scanf("%s",infile);
if((fp=fopen(infile,"r"))==NULL) /*打開一個二進制文件，為只讀方式*/
{
printf("打不開文件Can not open the file.\n");
return(head);
}
printf("\n尋找文件...Loading the file!\n");
p1=(STUDENT *)malloc(LEN); /*開辟一個新單元*/
if(!p1)
{
printf("內存溢出!Out of memory!\n");
return(head);
}
head=p1; /*申請到空間，將其作為頭指針*/
while(!feof(fp)) /*循環讀數據直到文件尾結束*/
{
if(fread(p1,LEN,1,fp)!=1) break; /*如果沒讀到數據，跳出循環*/
p1->next=(STUDENT *)malloc(LEN); /*為下一個結點開辟空間*/
if(!p1->next)
{
printf("Out of memory!\n");
return (head);
}
p2=p1; /*使p2指向剛才p1指向的結點*/
p1=p1->next; /*指針後移，新讀入數據鏈到當前表尾*/
}
p2->next=NULL; /*最後一個結點的後繼指針為空*/
fclose(fp);
printf("\n你成功的從文件中讀取了數據!\nYou have success to read data from the file!\n");
return (head);
}
❽ C語言建立一個「學生管理成績系統」
#include<stdio.h>
#include<malloc.h>
#include<string.h>
#include<conio.h>
#include<windows.h>
struct student//初始化結構體 包括學生學號和成績
{
char num[20];
float chengji;
struct student*next;
};
float p;
struct student* luru()//建立鏈表 錄入學生信息
{
int i;
student *head,*p1,*p2;
printf("錄入數據\n");
p1=head=(struct student*)malloc(sizeof(struct student));
p1->next=NULL;
for(i=0;i<10;i++)
{
system("cls");
printf("請輸入第%d個學生的數據\n",i+1);
p2=(struct student*)malloc(sizeof(struct student));
printf("\n請輸入學生學號：");
scanf("%s",p2->num);
printf("\n請輸入學生成績：");
scanf("%f",&p2->chengji);
p1->next=p2;
p2->next=NULL;
p1=p1->next;
}
printf("錄入成功！\n");
return head;
}
void shuchu(student *head)//輸出所有錄入的信息
{
student *p1;
int i;
printf("輸出信息\n");
p1=head->next;
printf("學號\t\t\t成績\n");
for(i=0;i<10;i++)
{
printf("%s\t\t",p1->num);
printf("%f\n",p1->chengji);
p1=p1->next;
}
printf("輸出完畢！\n");
}
void bijiao(student*head)//計算10個學生成績的平均分、最高分和最低分。
{
int i;
float max,min,sum=0;
student *p1;
printf("求平均值 最大 最小\n");
p1=head->next;;
max=min=p1->chengji;
for(i=0;i<10;i++)
{
if(p1->chengji>max)
{
max=p1->chengji;
}
if(p1->chengji<min)
{
min=p1->chengji;
}
sum+=p1->chengji;
p1=p1->next;
}
printf("最高成績是%f最低成績是%f平均成績是%f\n",max,min,sum/10);
p=sum/10;
}
void paixu(student *head)//對成績由低到高進行排序（使用冒泡法），並輸出排序後成績
{
student*p1;
float n;
float a[10];
int i;
int j;
printf("從小到大排序 輸出成績\n");
p1=head->next;
for(i=0;i<10;i++)
{
a[i]=p1->chengji;
p1=p1->next;
}
for(i=0;i<9;i++)
{
for(j=0;j<9-i;j++)
{
if(a[j]>a[j+1])
{
n=a[j];
a[j]=a[j+1];
a[j+1]=n;
}
}
}
for(i=0;i<10;i++)
{
printf("%f\t",a[i]);
}
}
void pingji(student*head)// 根據學生的成績評定等級，規定如下：0—59分為不及格，60—69分為及格，70—79為良好，80—100分為優秀。
{
int i;
student *p1;
printf("按成績評級\n");
p1=head->next;
for(i=0;i<10;i++)
{
if(p1->chengji<60)
{
printf("%s不及格\n",&p1->num);
}
if(p1->chengji<70&&p1->chengji>=60)
{
printf("%s及格\n",&p1->num);
}
if(p1->chengji<80&&p1->chengji>=70)
{
printf("%s良好\n",&p1->num);
}
if(p1->chengji<=100&&p1->chengji>=80)
{
printf("%s優秀\n",&p1->num);
}
p1=p1->next;
}
}
void tongji(student*head)//統計高於平均分的學生人數，並列印學號。
{
student *p1;
int i,j=0;
printf("如下學生成績高於平均分\n");
p1=head->next;
for(i=0;i<10;i++)
{
if(p1->chengji>p)
{
printf("%s\n",&p1->num);
j++;
}
}
printf("共%d個學生高於平均成績\n",j);
}
void chaxun(student*head)// 根據學號進行學生成績查詢。
{
student *p1;
int i,j,n;
char id[20];
for(;;)
{
system("cls");
p1=head->next;
j=0;
printf("請輸入要查詢的學號：");
scanf("%s",&id);
for(i=0;i<10;i++)
{
if(strcmp(p1->num,id)==0)
{
printf("%f\n",p1->chengji);
j=1;
break;
}
p1=p1->next;
}
if(j==0)
{
printf("查無此人");
}
printf("按0退出 否則繼續查詢");
scanf("%d",&n);
if(n==0)
break;
}
}
void main()
{
student *head;
head=luru();
getch();
shuchu(head);
getch();
bijiao(head);
getch();
paixu(head);
getch();
pingji(head);
getch();
tongji(head);
getch();
chaxun(head);
}
你試試吧 有問題 我再幫你改
❾ c語言中學生成績管理的問題
#include
#include
#include
struct STUDENT{
float score[3];
long id;
char names[20];
};
typedef struct STUDENT student;//simplify the struct STUDENT
typedef struct STUDENT *Pstudent;
void print();
void append();
void course_total();
void student_total();
void score_sort(int (*compare)(float a,float b));
void number_sort();
void name_sort(Pstudent names_[30]);
void number_search();
void name_search();
void statistic(Pstudent scores_[30]);
void show(int i);
int ascend(float a, float b){
if(a>b) return 1;
else return 0;
}
int descend(float a, float b){
if(a<b) return 1;
else return 0;
}
int n;//the number of students
int flg=1;//true print the result
student *stuArray[30];//the global variable can simplify the compute
int again=1;//whether to continue
int main(){
int i;
printf("Input student number(n<30):");
scanf("%d",&n);
int choice;
while(again){
print();
scanf("%d",&choice);
switch(choice){
case 1:
append();
break;
case 2:
course_total();//use flag to define whether to print
break;
case 3:
student_total();
break;
case 4:
score_sort(descend);
if(flg){
printf("Sort in descending order by total score of every student:\n");
printf("NO\tName\tMT\tEN\tPH\tSUM\tAVER\n");
for(i=0;i<n;i++)
show(i);
}
break;
case 5:
score_sort(descend);
if(flg){
printf("Sort in ascending order by total score of every student:\n");
printf("NO\tName\tMT\tEN\tPH\tSUM\tAVER\n");
for(i=0;i<n;i++)
show(n-1-i);
}
break;
case 6:
number_sort();
break;
case 7:
name_sort(stuArray);
break;
case 8:
number_search();
break;
case 9:
name_search();
break;
case 10:
statistic(stuArray);
break;
case 0:
again=0;
printf("End of program!\n");
break;
default:
printf("Input error!\n");
break;
}
}
return 0;
}
void print(){
printf("1.Append record\n");
printf("2.Calculate total and average score of every course\n");
printf("3.Calculate total and average score of every student\n");
printf("4.Sort in descending order by total score of every student\n");
printf("5.Sort in ascending order by total score of every student\n");
printf("6.Sort in ascending order by number\n");
printf("7.Sort in dictionary order by name\n");
printf("8.Search by number\n");
printf("9.Search by name\n");
printf("10.Statistic analysis\n");
printf("Please Input your choice:");
}
void append(){
int i;
printf("Input student's ID,name and score:\n");
for(i=0;i<n;i++){////the most significant part malloc the memory when appending record
stuArray[i] = (student *)malloc(sizeof(student));
scanf("%ld%s",&stuArray[i]->id,stuArray[i]->names);
scanf("%f",&stuArray[i]->score[0]);
scanf("%f",&stuArray[i]->score[1]);
scanf("%f",&stuArray[i]->score[2]);
}
}
void course_total(){
int i;
float sum0=0.0,sum1=0.0,sum2=0.0;
for(i=0;i<n;i++){
sum0+=stuArray[i]->score[0];
sum1+=stuArray[i]->score[1];
sum2+=stuArray[i]->score[2];
}
if(flg){
printf("course %d:sum=%.0f,aver=%.0f\n",1,sum0,sum0/n);
printf("course %d:sum=%.0f,aver=%.0f\n",2,sum1,sum1/n);
printf("course %d:sum=%.0f,aver=%.0f\n",3,sum2,sum2/n);
}
}
void student_total(){
float total[30]={0.0};
int i;
for(i=0;i<n;i++){
total[i]=stuArray[i]->score[0]+stuArray[i]->score[1]+stuArray[i]->score[2];
}
if(flg){
for(i=0;i<n;i++)
printf("student %d:sum=%.0f,aver=%.0f\n",i+1,total[i],total[i]/3);
}
}
void score_sort(int (*compare)(float a,float b)){
int i,j;
float total[30]={0.0};
for(i=0;i<n;i++){
total[i]=stuArray[i]->score[0]+stuArray[i]->score[1]+stuArray[i]->score[2];
}
for(i=0;i<n;i++){
for(j=0;j<=i;j++)
//if((*compare)(stuArray[i]->score[0]+stuArray[i]->score[1]+stuArray[i]->score[2],stuArray[j]->score[0]+stuArray[j]->score[1]+stuArray[j]->score[2])==0){
if((*compare)(total[i],total[j])==0){//just swap the pointer it simplify the program
student *tmp=(student *)malloc(sizeof(student));
memcpy(tmp,stuArray[i],sizeof(student));
memcpy(stuArray[i],stuArray[j],sizeof(student));
memcpy(stuArray[j],tmp,sizeof(student));
}//memcpy-> the hole the memory
}
}
void number_sort(){//沒必要傳參
int i,j;
for(i=0;i<n;i++){
for(j=0;j<i;j++)
if(stuArray[i]->idid){
student *tmp=(student *)malloc(sizeof(student));
memcpy(tmp,stuArray[i],sizeof(student));
memcpy(stuArray[i],stuArray[j],sizeof(student));
memcpy(stuArray[j],tmp,sizeof(student));
}
}
if(flg){
printf("Sort in ascending order by number:\n");
printf("NO\tName\tMT\tEN\tPH\tSUM\tAVER\n");
for(i=0;i<n;i++)
show(i);
}
}
void name_sort(Pstudent names_[30]){
int i,j;
for(i=0;i<n;i++){
for(j=0;j<=i;j++)
if(strcmp(names_[i]->names,names_[j]->names)<0){
student *tmp=(student *)malloc(sizeof(student));
memcpy(tmp,stuArray[i],sizeof(student));
memcpy(stuArray[i],stuArray[j],sizeof(student));
memcpy(stuArray[j],tmp,sizeof(student));
}
}
if(flg){
printf("Sort in dictionary order by name:\n");
printf("NO\tName\tMT\tEN\tPH\tSUM\tAVER\n");
for(i=0;i<n;i++)
show(i);
}
}
void number_search(){
long query;
printf("Input the number you want to search:");
scanf(" %ld",&query);
int i;
score_sort(descend);//100 98 87
for(i=0;i<n;i++){
if(stuArray[i]->id==query)
break;
}
if(i!=n){
printf("%d\t",i+1);
show(i);
}
else
printf("Not found!\n");
}
void name_search(){
char query[20];
score_sort(descend);
printf("Input the name you want to search:");
scanf("%s",query);
int i;
for(i=0;i<n;i++){
if(!strcmp(query,stuArray[i]->names)){
break;
}
}
if(i!=n){
printf("%d\t",i+1);
show(i);
}
else
printf("Not found!\n");
}
void statistic(Pstudent scores_[30]){//a pointer array stands for scores
float MT[30],EN[30],PH[30];
int i;
for(i=0;i<n;i++){
MT[i]=scores_[i]->score[0];
EN[i]=scores_[i]->score[1];
PH[i]=scores_[i]->score[2];
}
int sta[6]={0};//means the statistic of every student (<60 or 60-70 ....)
for(i=0;i<n;i++){
if(MT[i]<60)
sta[0]++;
if(MT[i]==100)
sta[5]++;
if(MT[i]>=60&&MT[i]<=69)
sta[1]++;
if(MT[i]>=70&&MT[i]<=79)
sta[2]++;
if(MT[i]>=80&&MT[i]<=89)
sta[3]++;
if(MT[i]>=90&&MT[i]<=100)
sta[4]++;
}
if(flg){
printf("For course %d:\n",1);
printf("<60\t%d\t%.2f%%\n",sta[0],sta[0]/(float)n*100);//change n to float
printf("60-69\t%d\t%.2f%%\n",sta[1],sta[1]/(float)n*100);
printf("70-79\t%d\t%.2f%%\n",sta[2],sta[2]/(float)n*100);
printf("80-89\t%d\t%.2f%%\n",sta[3],sta[3]/(float)n*100);
printf("90-100\t%d\t%.2f%%\n",sta[4],sta[4]/(float)n*100);
printf("100\t%d\t%.2f%%\n",sta[5],sta[5]/(float)n*100);
}
memset(sta,0,6*sizeof(int));//initialize the sta array
for(i=0;i<n;i++){
if(EN[i]<60)
sta[0]++;
if(EN[i]==100)
sta[5]++;
if(EN[i]>=60&&EN[i]<=69)
sta[1]++;
if(EN[i]>=70&&EN[i]<=79)
sta[2]++;
if(EN[i]>=80&&EN[i]<=89)
sta[3]++;
if(EN[i]>=90&&EN[i]<=100)
sta[4]++;
}
if(flg){
printf("For course %d:\n",2);
printf("<60\t%d\t%.2f%%\n",sta[0],sta[0]/(float)n*100);//change n to float
printf("60-69\t%d\t%.2f%%\n",sta[1],sta[1]/(float)n*100);
printf("70-79\t%d\t%.2f%%\n",sta[2],sta[2]/(float)n*100);
printf("80-89\t%d\t%.2f%%\n",sta[3],sta[3]/(float)n*100);
printf("90-100\t%d\t%.2f%%\n",sta[4],sta[4]/(float)n*100);
printf("100\t%d\t%.2f%%\n",sta[5],sta[5]/(float)n*100);
}
memset(sta,0,6*sizeof(int));
for(i=0;i<n;i++){
if(PH[i]<60)
sta[0]++;
if(PH[i]==100)
sta[5]++;
if(PH[i]>=60&&PH[i]<=69)
sta[1]++;
if(PH[i]>=70&&PH[i]<=79)
sta[2]++;
if(PH[i]>=80&&PH[i]<=89)
sta[3]++;
if(PH[i]>=90&&PH[i]<=100)
sta[4]++;
}
if(flg){
printf("For course %d:\n",3);
printf("<60\t%d\t%.2f%%\n",sta[0],sta[0]/(float)n*100);//change n to float
printf("60-69\t%d\t%.2f%%\n",sta[1],sta[1]/(float)n*100);
printf("70-79\t%d\t%.2f%%\n",sta[2],sta[2]/(float)n*100);
printf("80-89\t%d\t%.2f%%\n",sta[3],sta[3]/(float)n*100);
printf("90-100\t%d\t%.2f%%\n",sta[4],sta[4]/(float)n*100);
printf("100\t%d\t%.2f%%\n",sta[5],sta[5]/(float)n*100);
}
}
void show(int i){
printf("%ld\t%s\t",stuArray[i]->id,stuArray[i]->names);//order is the id after sort
printf("%.0f\t%.0f\t%.0f\t",stuArray[i]->score[0],stuArray[i]->score[1],stuArray[i]->score[2]);
float sum=stuArray[i]->score[0]+stuArray[i]->score[1]+stuArray[i]->score[2];
printf("%.0f\t%.0f\n",sum,sum/3);
}