c语言课程设计学生成绩管理编程
#include<stdio.h>
#include<conio.h>
#include <stdlib.h>
#include<string.h>
#define MAX 80
#define max 3
int nu=0;
struct classname
{
char name[20];
float score;
};
struct student
{
char no[20];
char std_name[20];
struct classname km[max];
float ave;
float sum;
int save;
};
struct student stu[MAX],*p;
void chushi()
{
int i,j;
for(i=0;i<MAX;i++)
{
for(j=0;j<20;j++)
{
stu[i].no[j]=NULL;
stu[i].std_name[j]=NULL;
stu[i].km[j].name[j]=NULL;
stu[i].km[j].score=0;
}
stu[i].ave=0;
stu[i].sum=0;
stu[i].save=0;
}
}
void av()/*求平均值*/
{
int i;
for(i=0;i<nu;i++)
{
stu[i].sum=stu[i].km[1].score+stu[i].km[2].score+stu[i].km[3].score;
stu[i].ave=stu[i].sum/3;
}
}
void first_check()
{
FILE *p;
int i,j;
struct classname frist[max];
for(i=0;i<max;i++)
{
for(j=0;j<20;j++)
frist[i].name[j]=NULL;
frist[i].score=0;
}
if ((p=fopen("c:\\kemu.txt","r"))==NULL)
{
printf("您好，欢迎使用学生成绩管理系统\n\n因为您是第一次使用，请输入科目名称（三科）\n\n");
p=fopen("c:\\kemu.txt","w");
printf("输入课程1名称:");
scanf("%s",frist[0].name);
fprintf(p,"%s\n",frist[0].name);
printf("输入课程2名称:");
scanf("%s",frist[1].name);
fprintf(p,"%s\n",frist[1].name);
printf("输入课程3名称:");
scanf("%s",frist[2].name);
fprintf(p,"%s\n",frist[2].name);
}
system("cls");
fclose(p);
}
void save_nu()
{
FILE *p;
p=fopen("c:\\renshu.txt","w");
fprintf(p,"%d\n",nu);
fclose(p);
}
void Save_add(int n)
{
FILE * p;
int i;
p= fopen("c:\\cheji.txt","at");
if (p == NULL)
{
printf("文件不存在！！\n");
exit(0);
}
save_nu();
for (i = 0;i<n;i++)
if(stu[i].save==1)
{
stu[i].sum=stu[i].km[1].score+stu[i].km[2].score+stu[i].km[3].score;
stu[i].ave=stu[i].sum/3;
fprintf(p,"%s %s %2.1f %2.1f %2.1f %2.1f %2.1f \n",stu[i].no,stu[i].std_name,stu[i].km[0].score,stu[i].km[1].score,stu[i].km[2].score,stu[i].ave,stu[i].sum);
}
fclose(p);
}
void Save()
{
FILE * p;
int i;
p= fopen("c:\\cheji.txt","w");
if (p == NULL)
{
printf("文件不存在！！\n");
exit(0);
}
save_nu();
for (i = 0;i<nu;i++)
if(stu[i].save==1)
{
av();
fprintf(p,"%s %s %2.1f %2.1f %2.1f %2.1f %2.1f \n",stu[i].no,stu[i].std_name,stu[i].km[0].score,stu[i].km[1].score,stu[i].km[2].score,stu[i].ave,stu[i].sum);
}
fclose(p);
}
int read_nu()
{
FILE *p;
char ch,s[10]={'\0'};
int i=0;
p=fopen("c:\\renshu.txt","r");
if(p==NULL)
{
save_nu();
return 0;
}
ch=fgetc(p);
while(ch!='\n')
{
s[i]=ch;
ch=fgetc(p);
i++;
}
nu=atoi(s);
fclose(p);
return 0;
}
int read_km()
{
FILE *p;
int i,j=0;
char s[20]={'\0'};
chushi();
p=fopen("c:\\kemu.txt","r");
if(p==NULL)
{
printf("ERROR read_km");
return 0;
}
fgets(s,20,p);
while(strlen(s)!=0)
{
for(i=0;i<strlen(s);i++)
if(s[i]==10)
{
s[i]='\0';
break;
}
for(i=0;i<=nu;i++)
strcpy(stu[i].km[j].name,s);
for(i=0;i<20;i++)
s[i]='\0';
j++;
fgets(s,20,p);
}
}
void read()
{
FILE *p;
int i,j,n,k,z=0;
char s[50]={'\0'};
char o[10]={'\0'};
p=fopen("c:\\cheji.txt","r");
if(p==NULL)
printf("ERROR_read");
chushi();
read_km();
fgets(s,50,p);
while(strlen(s)!=0)
{
j=0;
for(i=0;i<50;i++)
{
if(s[i]!='\n')
{
n=0;
while(j==0)
{
if(s[i]!=' ')
{
stu[z].no[n]=s[i];
n++;i++;
}
else
break;
}
while(j==1)
{
if(s[i]!=' ')
{
stu[z].std_name[n]=s[i];
n++;i++;
}
else
break;
}
while(j==2)
{
if(s[i]!=' ')
{
o[n]=s[i];
n++;i++;
}
else
{
stu[z].km[0].score=atoi(o);
break;
}
}
while(j==3)
{
if(s[i]!=' ')
{
o[n]=s[i];
n++;i++;
}
else
{
stu[z].km[1].score=atoi(o);
break;
}
}
while(j==4)
{
if(s[i]!=' ')
{
o[n]=s[i];
n++;i++;
}
else
{
stu[z].km[2].score=atoi(o);
break;
}
}
while(j==5)
{
if(s[i]!=' ')
{
o[n]=s[i];
n++;i++;
}
else
{
stu[z].ave=atoi(o);
break;
}
}
while(j==6)
{
if(s[i]!=' ')
{
o[n]=s[i];
n++;i++;
}
else
{
stu[z].sum=atoi(o);
break;
}
}
for(k=0;k<10;k++)
o[k]='\0';
}
else
break;
j++;
}
for(i=0;i<50;i++)
s[i]='\0';
fgets(s,50,p);
z++;
}
}
void putin()
{
int n,i=0;
char ch;
read_km();
do
{
printf("\t\t\t\t录入学员信息\n输入第%d个学员的信息\n",i+1);
printf("\n输入学生编号:");
scanf("%s",stu[i].no);
printf("\n输入学员姓名:");
scanf("%s",stu[i].std_name);
printf("\n输入课程%s的分数:",stu[0].km[0].name);
scanf("%f",&stu[i].km[0].score);
printf("\n输入课程%s的分数:",stu[0].km[1].name);
scanf("%f",&stu[i].km[1].score);
printf("\n输入课程%s的分数:",stu[0].km[2].name);
scanf("%f",&stu[i].km[2].score);
stu[i].save=1;
printf("\n\n");
i++;
n=i;
printf("是否继续输入?(Y/N)");
fflush(stdin);
ch=getch();
system("cls");
}
while(ch!='n'&&ch!='N');
system("cls");
if(nu==0)
{
nu=n;
Save();
}
else
{
nu=n+nu;
Save_add(n);
}
}
int putout()
{
int i;char s;
if(nu==0)
{
printf("学生信息为零!请录入...");
return 0;
}
read();
do
{
printf("学生成绩信息：\n\n");
for(i=0;i<nu;i++)
printf("学号：%s 姓名：%s\n%s分数：%2.1f\t%s分数：%2.1f\t%s分数：%2.1f\n平均分数：%2.1f\t总成绩：%2.1f\n\n",stu[i].no,stu[i].std_name,stu[i].km[0].name,stu[i].km[0].score,stu[i].km[1].name,stu[i].km[1].score,stu[i].km[2].name,stu[i].km[2].score,stu[i].ave,stu[i].sum);
printf("\t\t按任意键返回主菜单");
fflush(stdin);
s=getch();
}
while(!s);
system("cls");
}
int sort()/*排序数据函数*/
{
struct student temp;
int i,j;
char s;
if(nu==0)
{
printf("学生信息为零!请录入...");
return 0;
}
chushi();
read();
for(i=1;i<nu;i++)
{
for(j=1;j<=nu-i;j++)
{
if(stu[j-1].ave<stu[j].ave)
{
temp=stu[j];
stu[j]=stu[j-1];
stu[j-1]=temp;
}
}
}
do
{
printf("学生成绩信息：\n\n");
for(i=0;i<nu;i++)
printf("学号：%s 姓名：%s 平均成绩：%2.1f\n\n",stu[i].no,stu[i].std_name,stu[i].ave);
printf("\t\t按任意键返回主菜单");
fflush(stdin);
s=getch();
}
while(!s);
system("cls");
}
void find()/*查询函数*/
{
int j,i=0;
int c=0;
char search[10]={'\0'};
char as;
if(nu==0)
{
printf("学生信息为零!请录入...");
return 0;
}
chushi();
read();
do
{
printf("输入要查询课程名称:");
scanf("%s",search);
for(j=0;j<max;j++)
if(!strcmp(stu[i].km[j].name,search))
{
c=1;
printf("\n该课程不及格学生姓名：\n");
for(i=0;i<nu;i++)
if(stu[i].km[j].score<60)
printf("%s\n",stu[i].std_name);
}
if(c==0)
printf("无此课程！");
printf("\n\t\t按任意键返回主菜单");
fflush(stdin);
as=getch();
}
while(!as);
system("cls");
}
void tongji()
{
int j,m,z,i=0;
char s;
if(nu==0)
{
printf("学生信息为零!请录入...");
return 0;
}
chushi();
read();
for(z=0;z<max;z++)
{
m=stu[i].km[z].score;j=0;
printf("%s 最高分： ",stu[i].km[z].name);
for(i=0;i<nu;i++)
if(m<stu[i].km[z].score)
{
m=stu[i].km[z].score;
j=i;
}
printf("%s\t",stu[j].std_name);
j=0;i=0;m=stu[i].km[z].score;
printf("%s 最低分： ",stu[i].km[z].name);
for(i=0;i<nu;i++)
if(m>stu[i].km[z].score)
{
m=stu[i].km[z].score;
j=i;
}
printf("%s\t",stu[j].std_name);
m=0;j=0;i=0;
printf("%s 平均分： ",stu[i].km[z].name);
for(i=0;i<nu;i++)
m=m+stu[i].km[z].score;
printf("%d\n",m/nu);
m=0;i=0;
printf("%s 分数低于的60人数： ",stu[i].km[z].name);
for(i=0;i<nu;i++)
if(stu[i].km[z].score<60)
m++;
printf("%d\t",m);
m=0;j=0;i=0;
printf("%s 分数高于60的人数： ",stu[i].km[z].name);
for(i=0;i<nu;i++)
if(stu[i].km[z].score>60)
m++;
printf("%d\n\n",m);
}
do
{
printf("\t\t按任意键返回主菜单");
fflush(stdin);
s=getch();
}
while(!s);
system("cls");
}
void main()/*主函数*/
{
int as;
first_check();
start: printf("\n\t\t\t欢迎使用学生成绩管理系统\n");
/*一下为功能选择模块*/
do
{
printf("\n\t\t\t\t1.录入学员信息\n\t\t\t\t2.显示学员信息\n\t\t\t\t3.成绩排序信息\n\t\t\t\t4.查询不及格学生\n\t\t\t\t5.统计信息\n\t\t\t\t6.退出\n");
printf("\t\t\t\t选择功能选项:");
fflush(stdin);
read_nu();
scanf("%d",&as);
switch(as)
{
case 1:system("cls");putin();break;
case 2:system("cls");putout();break;
case 3:system("cls");sort();break;
case 4:system("cls");find();break;
case 5:system("cls");tongji();break;
case 6:system("exit");exit(0);
default:system("cls");goto start;
}
}
while(1);
/*至此功能选择结束*/
}
❷ C语言课程设计学生成绩管理
/*********************************************************
*创建日期：2011-04-27
*程序名称：链表综合操作
*程序作者：子夜星空
*备注信息：以前写的。
**********************************************************/
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#define SN 2 //科目数
typedef struct student
{
char num[10],
name[10];
float score[SN],
sum,
avg;
struct student *next;
}STU;
/**********输入链表单元内容************/
void input(STU *p)
{
int i;
printf("please input number:\n");
scanf("%s",p->num);
printf("please input name:\n");
scanf("%s",p->name);
printf("please input %d scores:\n",SN);
p->sum=0;
for(i=0;i<SN;i++)
{
scanf("%f",&p->score[i]);
p->sum+=p->score[i];
}
p->avg=p->sum/SN;
}
/**********创建一个链表单元**********/
STU *creat_node()
{
STU *p;
p=(STU *)malloc(sizeof(STU));
if(p == NULL)
{ printf("No enough memory !");
exit(0);
}
input(p);
p->next=NULL;
return p;
}
/**********创建一个链表**********/
STU *creat_list()
{
STU *head=NULL,*tail=NULL,*p;
char str[4];
printf("List creating...\n");
do
{
printf("Do you want to continue (yes/no) :");
scanf("%s",str);
if(strcmp(str,"yes")==0)
{
p=creat_node();
if(head==NULL){head=tail=p;continue;}
tail->next=p;
tail=p;
}
if(strcmp(str,"yes")!=0&&strcmp(str,"no")!=0)
{
printf("You must input 'yes' or 'no'.\n");
//getchar();
continue;
}
if(strcmp(str,"no")==0)break;
//getchar();
}while(1);
printf("List create end...\n\n");
return head;
}
/************输出一个链表单元**********/
void print_a_node(STU *fin)
{
int i;
printf("%s;\t%s;\t%0.2f;\t%0.2f\t",fin->num,fin->name,fin->avg,fin->sum);
for(i=0;i<SN;i++)
printf("%0.2f\t",fin->score[i]);
putchar(10);
}
/************输出一个链表头部**********/
void print_a_head()
{
int i;
printf("number\tname\tavg\tsum\t");
for(i=0;i<SN;i++)
printf("score%d\t",i+1);
putchar(10);
}
/************输出操作菜单**********/
void print_menu_list()
{
printf("======the operation menu list======\n");
printf("[0]-->exit\n[1]-->creat a list\n[2]-->print the list\n[3]-->insert a list node\n[4]-->select by number\n[5]-->select by name\n");
printf("[6]-->delete a list node\n[7]-->update a list node\n[8]-->order the list by score\n[9]-->print the operation menu list\n");
printf("======the operation menu list======\n");
putchar(10);
}
/************输出链表**********/
int print_list(STU *stu)
{
STU *p=stu;
if(stu==NULL)
{
printf("no records!!!\n");
return (0);
}
print_a_head();
while(p!=NULL)
{
print_a_node(p);
p=p->next;
}
putchar(10);
return (0);
}
/************插入链表单元************/
void insert(STU *stu)
{
STU *tail=stu,*p;
printf("now insert a list node...\n");
while(tail->next!=NULL)
{
tail=tail->next;
}
p=creat_node();
tail->next=p;
printf("Insert end...\n\n");
}
/**********查找链表num**********/
STU *find_num(STU *stu, char num[])
{
STU *p=stu,*pr=NULL;
while(p!=NULL)
{
if(strcmp(p->num,num)==0){pr=p;break;}
p=p->next;
}
return pr;
}
/**********查找链表name**********/
STU *find_name(STU *stu, char name[])
{
STU *p=stu,*pr=NULL;
while(p!=NULL)
{
if(strcmp(p->name,name)==0){pr=p;break;}
p=p->next;
}
return pr;
}
/************删除链表单元************/
STU * delet(STU *stu, char name[])
{
STU *p=stu,*front=stu;
if((p=find_name(stu,name))!=NULL)
{
printf("the delete record:\n");
print_a_head();
print_a_node(p);
}
else
{
printf("can not find the student!\n");
return stu;
}
p=stu;
while(p!=NULL&&strcmp(p->name,name)!=0)
{
front=p;
p=p->next;
}
if(p==stu&&front==stu)stu=NULL;
else front->next=p->next;
if(p!=NULL)p->next=NULL;
free(p);
printf("delete end...\n\n");
return stu;
}
/**********更新链表单元**********/
void update(STU *stu, char name[])
{
STU *fin;
if((fin=find_name(stu,name))!=NULL)
{
printf("before update:\n");
print_a_head();
print_a_node(fin);
}
else
{
printf("can not find the student!\n");
exit(0);
}
printf("please input the new records now...\n");
input(fin);
printf("update end...\n\n");
}
/**********链表单元排序**********/
void order(STU *stu)
{
STU *pi,*pj,*max,temp;
int i;
if(stu!=NULL&&stu->next!=NULL)
{
for(pi=stu;pi!=NULL;pi=pi->next)
{
max=pi;
for(pj=pi->next;pj!=NULL;pj=pj->next)
{
if(max->sum<pj->sum)
max=pj;
}
if(max!=pi)
{
strcpy(temp.num,max->num);
strcpy(max->num,pi->num);
strcpy(pi->num,temp.num);
strcpy(temp.name,max->name);
strcpy(max->name,pi->name);
strcpy(pi->name,temp.name);
temp.sum=pi->sum;
pi->sum=max->sum;
max->sum=temp.sum;
temp.avg=max->avg;
max->avg=pi->avg;
pi->avg=temp.avg;
for(i=0;i<SN;i++)
{
temp.score[i]=max->score[i];
max->score[i]=pi->score[i];
pi->score[i]=temp.score[i];
}
}
}
printf("order end...\n\n");
}
else
printf("do not need to order...\n\n");
}
/************释放链表**********/
void fre(STU *stu)
{
STU *p=stu,*pf;
if(stu==NULL)
{
printf("the list is NULL!\n");
exit(0);
}
while(p!=NULL)
{
pf=p->next;
free(p);
p=pf;
}
if(stu==NULL)
printf("free the list.\n");
}
STU * menu(STU *stu,int cas)
{
STU *fin=NULL;
char a[10];
switch(cas)
{
//创建链表
case 1:
if(stu!=NULL)fre(stu);
stu=creat_list();
break;
//输出链表
case 2:
if(stu==NULL){printf("can not do this operation!\n");putchar(10);break;}
print_list(stu);
break;
//插入链表单元
case 3:
if(stu==NULL){printf("can not do this operation!\n");putchar(10);break;}
insert(stu);
break;
//查找输出number
case 4:
if(stu==NULL){printf("can not do this operation!\n");putchar(10);break;}
printf("please input the 'number' you want to find:\n");
scanf("%s",a);
if((fin=find_num(stu,a))!=NULL)
{
print_a_head();
print_a_node(fin);
}
else printf("no found!\n");
break;
//查找输出name
case 5:
if(stu==NULL){printf("can not do this operation!\n");putchar(10);break;}
printf("please input the 'name' you want to find:\n");
scanf("%s",a);
if((fin=find_name(stu,a))!=NULL)
{
print_a_head();
print_a_node(fin);
putchar(10);
}
else printf("no found!\n");
break;
//删除链表单元
case 6:
if(stu==NULL){printf("can not do this operation!\n");putchar(10);break;}
printf("please input the 'name' you want to delete:\n");
scanf("%s",a);
stu=delet(stu,a);
break;
//更新链表单元
case 7:
if(stu==NULL){printf("can not do this operation!\n");putchar(10);break;}
printf("please input the 'name' you want to update:\n");
scanf("%s",a);
update(stu,a);
break;
//链表单元排序
case 8:
if(stu==NULL){printf("can not do this operation!\n");putchar(10);break;}
printf("order by score\n");
order(stu);
break;
//打印链表操作菜单
case 9:
print_menu_list();
break;
default:
printf("can not do this operation!\n");putchar(10);break;
}
return stu;
}
void main()
{
STU *stu=NULL;
int cas;
//打印操作提示
print_menu_list();
//用户操作
do
{
printf("press 0~9 to choose operation!\n");
scanf("%d",&cas);
if(cas<0||cas>9){printf("you must press 0 to 9 !\n");continue;}
if(cas!=0)stu=menu(stu,cas);
if(cas==0){printf("operation end !\n\n");fre(stu);}
}while(cas!=0);
//释放链表
fre(stu);
}
❸ C语言课程设计学生成绩管理系统 功能：学生成绩管理系统，每个学
参考以下，部分代码改了即可：首先将记录储存再TXT文件下，格式如下所示：学号姓名性别等级笔试机试类别1张三男二级66772李四男三级88993张二男二级40604李二女二级50595王五女三级99996王三男二级77617刘四男四级60598刘五女二级88779张五女二级648110李六女二级5930-------------------------------------------------------------代码如下，本人亲自编写，无错误通过--------------------------------------------------------------------#include#include#include#includeusingnamespacestd;voidadd_information(stringstr);voiddelete_information(stringstr);voidedit_information(stringstr);voidscanf_information(stringstr);voidscore_scanf(stringstr);voidpingfen(stringstr);voidpass_total(stringstr);main(){cout>number;stringname;//统计用的科目名switch(number){case1:cout>number;switch(number){case1:add_information(str);break;case2:delete_information(str);break;case3:edit_information(str);break;case4:scanf_information(str);break;default:cout>a>>b>>c>>d>>e>>f;outstream.precision(6);//显示精度outstreamname_1;stringa,b,c,d,e,f;ofstreamoutstream;//暂存的中间文件outstream.open("temp.txt");boolflag=0;//是否查找到while(1){//删除操作，自己感觉都有点麻烦instream>>a>>b>>c>>d>>e>>f;if(name_1!=a){outstreamname_1;stringa,b,c,d,e,f;ofstreamoutstream;//暂存的中间文件outstream.open("temp.txt");boolflag=0;//是否查找到while(1){//删除操作，自己感觉都有点麻烦instream>>a>>b>>c>>d>>e>>f;if(name_1==a){//找到修改的记录flag=1;cout>a>>b>>c>>d>>e>>f;}outstreama>>b>>c>>d>>e>>f;coutname_1;stringa,b,c,d,e,f,g;boolflag=0;//是否查找到while(1){//删除操作，自己感觉都有点麻烦instream>>a>>b>>c>>d>>e>>f>>g;if(name_1==g){//找到修改的记录flag=1;couta>>b>>c>>d>>e>>f;outstream=85)outstream=70&&f=60&&f=70&&e=70)outstream=60&&f=60&&e=60)outstreama>>b>>c>>d>>e>>f>>g;if(g=="优秀"||g=="良好"||g=="及格")count++;if(instream.eof())break;}cout<<"合格的人数为："<
❹ C语言课程设计-学生成绩管理程序
||#include<stdio.h> /*引用库函数*/
#include<stdlib.h>
#include<ctype.h>
#include<string.h>
typedef struct /*定义结构体数组*/
{
char num[10]; /*学号*/
char name[20]; /*姓名*/
int score; /*成绩*/
}Student;
Student stu[80]; /*结构体数组变量*/
int menu_select() /*菜单函数*/
{
char c;
do{
system("cls"); /*运行前清屏*/
printf("\t\t****Students' Grade Management System****\n"); /*菜单选择*/
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(); /*读入选择*/
}while(c<'0'||c>'9');
return(c-'0'); /*返回选择*/
}
int Input(Student stud[],int n) /*输入若干条记录*/
{int i=0;
char sign,x[10]; /*x[10]为清除多余的数据所用*/
while(sign!='n'&&sign!='N') /*判断*/
{ printf("\t\t\tstudent's num:"); /*交互输入*/
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); /*清除多余的输入*/
printf("\t\t\tany more records?(Y/N)");
scanf("\t\t\t%c",&sign); /*输入判断*/
i++;
}
return(n+i);
}
void Display(Student stud[],int n) /*显示所有记录*/
{
int i;
printf("\t\t\t-----------------------------------\n"); /*格式头*/
printf("\t\t\tnumber name score\n");
printf("\t\t\t-----------------------------------\n");
for(i=1;i<n+1;i++) /*循环输入*/
{
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) /*每十个暂停*/
{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) /*按学号排序*/
{ 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) /*插入一条记录*/
{char x[10]; /*清除多余输入所用*/
printf("\t\t\tstudent's num:"); /*交互式输入*/
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); /*调用排序函数*/
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，删除一条记录*/
{ char s[20];
int i=0,j;
printf("\t\t\ttell me his(her) name:"); /*交互式问寻*/
scanf("%s",s);
while(strcmp(stud[i].name,s)!=0&&i<n) i++; /*查找判断*/
if(i==n)
{ printf("\t\t\tnot find!\n"); /*返回失败信息*/
return(n);
}
for(j=i;j<n-1;j++) /*删除操作*/
{
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) /*查找并显示一个记录*/
{ char s[20];
int i=0;
printf("\t\t\tinput his(her) name:"); /*交互式输入*/
scanf("\t\t\t%s",s);
while(strcmp(stud[i].name,s)!=0&&i<n) i++; /*查找判断*/
if(i==n)
{ printf("\t\t\tnot find!\n"); /*输入失败信息*/
return;
}
printf("\t\t\this(her) number:%s\n",stud[i].num); /*输出该学生信息*/
printf("\t\t\this(her) score:%d\n",stud[i].score);
}
void Statistic(Student stud[],int n) /*新增功能，输出统计信息*/
{ int i,j=0,k=0,sum=0;
float aver; /*成绩平均值*/
for(i=0;i<n;i++) /*循环输入判断*/
{
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); /*总共记录数*/
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) /*从文件中读入数据*/
{ int i=0,num;
FILE *fp; /*定义文件指针*/
char filename[20]; /*定义文件名*/
printf("\t\t\tInput the filename:");
scanf("\t\t\t%s",filename); /*输入文件名*/
if((fp=fopen(filename,"rb"))==NULL) /*打开文件*/
{ printf("\t\t\tcann't open the file\n"); /*打开失败信息*/
printf("\t\t\t");
system("pause");
return(n);
}
fscanf(fp,"%d",&num); /*读入总记录量*/
while(i<num) /*循环读入数据*/
{
fscanf(fp,"%s%s%d",stud[n+i].num,stud[n+i].name,&stud[n+i].score);
i++;
}
n+=num;
fclose(fp); /*关闭文件*/
printf("\t\t\tSuccessed!\n");
printf("\t\t\t");
system("pause");
return(n);
}
void WritetoText(Student stud[],int n) /*将所有记录写入文件*/
{
int i=0;
FILE *fp; /*定义文件指针*/
char filename[20]; /*定义文件名*/
printf("\t\t\tWrite Records to a Text File\n"); /*输入文件名*/
printf("\t\t\tInput the filename:");
scanf("\t\t\t%s",filename);
if((fp=fopen(filename,"w"))==NULL) /*打开文件*/
{
printf("\t\t\tcann't open the file\n");
system("pause");
return;
}
fprintf(fp,"%d\n",n); /*循环写入数据*/
while(i<n)
{
fprintf(fp,"%-16s%-15s%d\n",stud[i].num,stud[i].name,stud[i].score);
i++;
}
fclose(fp); /*关闭文件*/
printf("Successed!\n"); /*返回成功信息*/
}
void main() /*主函数*/
{
int n=0;
for(;;)
{
switch(menu_select()) /*选择判断*/
{
case 1:
printf("\t\t\tInput Records\n"); /*输入若干条记录*/
n=Input(stu,n);
break;
case 2:
printf("\t\t\tDisplay All Records\n"); /*显示所有记录*/
Display(stu,n);
break;
case 3:
printf("\t\t\tSort\n");
Sort_by_num(stu,n); /*按学号排序*/
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); /*插入一条记录*/
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，删除一条记录*/
printf("\t\t\t");
system("pause");
break;
case 6:
printf("\t\t\tQuery\n");
Query_a_record(stu,n); /*查找并显示一个记录*/
printf("\t\t\t");
system("pause");
break;
case 7:
printf("\t\t\tStatistic\n");
Statistic(stu,n); /*新增功能，输出统计信息*/
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，输出统计信息*/
break;
case 9:
printf("\t\t\tWrite to a Text file\n");
WritetoText(stu,n); /*循环写入数据*/
printf("\t\t\t");
system("pause");
break;
case 0:
printf("\t\t\tHave a Good Luck,Bye-bye!\n"); /*结束程序*/
printf("\t\t\t");
system("pause");
exit(0);
}
}
}
❺ 急求C语言课程设计：学生成绩管理程序
#include<stdio.h>
#include<string.h>
#define LIST_INIT_SIZE 10
#define INCREAMENT 5
#define TRUE 1
#define FALSE 0
#define ERROR 0
#define OVERFLOW -2
#define OK 1
#define LT(a,b) ((a)<(b))
int i,j,low,high;
typedef int Status;
typedef struct
{int seat;
char name[7];
char sex[7];
int year;
int score[3];
int total;
float average;
}rec;
typedef struct
{rec *stu;
int length;
int listsize;
}SqList;
typedef struct
{int grade;
int lowest;
int highest;
double ave;
int nam;
}dis;
typedef struct
{dis *sco;
int len;
int size;
}Dis;
Status InitList_Sq(SqList *L)
{(*L).stu=(rec *)malloc(LIST_INIT_SIZE*sizeof(rec));
if(!(*L).stu) exit (OVERFLOW);
(*L).length=5;
(*L).listsize=10;
return OK;
}
Status List_Sq(Dis *S)
{(*S).sco=(dis *)malloc(LIST_INIT_SIZE*sizeof(dis));
if(!(*S).sco) exit (OVERFLOW);
(*S).len=3;
(*S).size=10;
return OK;
}
Status Insert(SqList *L)
{int g;
printf("\nHow many students you want to input:");
scanf("%d",&g);
for(i=(*L).length+1;i<=(*L).length+g;i++)
{if((*L).listsize<=(*L).length)
{(*L).stu=(int *)realloc((*L).stu,((*L).listsize+INCREAMENT)*sizeof(int));
if(!(*L).stu)exit(OVERFLOW);
(*L).listsize+=INCREAMENT;
}
printf("please input student'infmation:");
printf("\nxue hao:");
scanf("%d",&(*L).stu[i].seat);
printf("\nname:");
scanf("%s",&(*L).stu[i].name);
printf("\nsex:");
scanf("%s",&(*L).stu[i].sex);
printf("\nyear:");
scanf("%d",&(*L).stu[i].year);
printf("\ngrades of three disciplines:");
for(j=0;j<3;j++)
scanf("%d",&(*L).stu[i].score[j]);
}
(*L).length+=g;
}
Status Delete(SqList *L,int i)
{rec *p,*q;
rec *e;
if((i<1)||(i>(*L).length))return ERROR;
p=&((*L).stu[i]);
*e=*p;
q=(*L).stu+(*L).length;
for(++p;p<=q;++p)*(p-1)=*p;
--(*L).length;
return OK;
}
Computing(SqList *L)
{for(i=0;i<=(*L).length;i++)
{(*L).stu[i].total=(*L).stu[i].score[0]+(*L).stu[i].score[1]+(*L).stu[i].score[2];
(*L).stu[i].average=(*L).stu[i].total/3;
}
return OK;
}
void BInsertSort(SqList *L)
{int m;
for(i=2;i<=(*L).length;++i)
{(*L).stu[0]=(*L).stu[i];
low=1;
high=i-1;
while(low<=high)
{m=(low+high)/2;
if(LT((*L).stu[0].seat,(*L).stu[m].seat)) high=m-1;
else low=m+1;
}
for(j=i-1;j>=high+1;--j) (*L).stu[j+1]=(*L).stu[j];
(*L).stu[high+1]=(*L).stu[0];
}
}
int Partion(SqList *L,int low ,int high)
{int pivotkey;
(*L).stu[0]=(*L).stu[low];
pivotkey=(*L).stu[low].total;
while(low<high)
{while(low<high&&(*L).stu[high].total>=pivotkey) --high;
(*L).stu[low]=(*L).stu[high];
while(low<high&&(*L).stu[low].total<=pivotkey) ++low;
(*L).stu[high]=(*L).stu[low];
}
(*L).stu[low]=(*L).stu[0];
return low;
}
int QSort(SqList *L, int low,int high)
{int pivotloc;
if(low<high)
{pivotloc=Partion(&(*L),low,high);
QSort(&(*L),low,pivotloc-1);
QSort(&(*L),pivotloc+1,high);
}
}
int Com(Dis *S,SqList *L)
{int g;
for(j=0;j<3;j++)
{(*S).sco[j].highest=(*L).stu[1].score[j];
(*S).sco[j].lowest=(*L).stu[1].score[j];
(*S).sco[j].grade=0;
}
(*S).sco[0].nam=1;
(*S).sco[1].nam=2;
(*S).sco[2].nam=3;
for(j=0;j<(*S).len;j++)
{for(i=0;i<(*L).length;i++)
{(*S).sco[j].grade+=(*L).stu[i+1].score[j];
if((*S).sco[j].highest<(*L).stu[i+1].score[j])
(*S).sco[j].highest=(*L).stu[i+1].score[j];
if((*S).sco[j].lowest>(*L).stu[i+1].score[j])
(*S).sco[j].lowest=(*L).stu[i+1].score[j];
}
(*S).sco[j].ave=(*S).sco[j].grade/(*L).length;
}
printf("\nPlease input the discipline:1.Math 2.English 3.Program design");
scanf("%d",&g);
for(i=0;i<3;i++)
if((*S).sco[i].nam==g)
print_3(&(*S),i);
}
print_1(SqList *L)
{int i;
printf("\nseat name sex year Math English Program\n");
for(i=1;i<=(*L).length;i++)
{printf("%d %s %s %d %d %d %d\n",(*L).stu[i].seat,(*L).stu[i].name,(*L).stu[i].sex, (*L).stu[i].year,(*L).stu[i].score[0],(*L).stu[i].score[1],(*L).stu[i].score[2]);
}
return OK;
}
print_2(SqList *L)
{int i;
printf("\nseat name sex year Math English Program total averge\n");
for(i=(*L).length;i>=1;i--)
{printf("%d %s %s %d %d %d %d %d %f\n",(*L).stu[i].seat,(*L).stu[i].name,(*L).stu[i].sex, (*L).stu[i].year,(*L).stu[i].score[0],(*L).stu[i].score[1],(*L).stu[i].score[2],(*L).stu[i].total,(*L).stu[i].average);
}
return OK;
}
print_3(Dis *S,int g)
{printf("\nThe average:%lf",(*S).sco[g].ave);
printf("\nThe highest:%d",(*S).sco[g].highest);
printf("\nThe lowest:%d",(*S).sco[g].lowest);
}
print(SqList *L,int i)
{
printf("\nseat name sex year Math English Program\n");
printf("%d %s %s %d %d %d %d\n",(*L).stu[i].seat,(*L).stu[i].name,(*L).stu[i].sex, (*L).stu[i].year,(*L).stu[i].score[0],(*L).stu[i].score[1],(*L).stu[i].score[2]);
return OK;
}
main()
{SqList L;
Dis S;
int i,j,k;
i=InitList_Sq(&L);
if(i)
{rec s[5]={{103,"zhao","male ",19,80,90,75},
{102,"qian","female",20,85,82,69},
{105,"sun ","male ",20,90,56,81},
{104,"li ","male ",20,89,78,88},
{101,"zhou","female",19,78,79,86}};
for(i=0;i<5;i++)
{L.stu[i+1]=s[i];
}
}
print_1(&L);
while(1)
{printf("Please choose to search:1.Insert 2.delete 3.sort according to xuehao 4.continue");
scanf("%d",&k);
if(k==1)
{Insert(&L);
print_1(&L);
}
if(k==2)
{printf("Please input the student's xue hao you want to delete\n");scanf("%d",&j);
for(i=1;L.stu[i].seat!=j&&i<=L.length;i++);
if(i<=L.length) {Delete(&L,i);print_1(&L);}
else printf("There is none of the person\n");
}
if(k==3)
{BInsertSort(&L);
print_1(&L);
}
if(k==4) break;
getch();
}
List_Sq(&S);
while(1)
{printf("\nPlease choose 1.the sort of total 2.one subject 3.search 4.leave");
scanf("%d",&k);
if(k==1)
{Computing(&L);
QSort(&L,1,L.length);print_2(&L);
}
if(k==2)Com(&S,&L);
if(k==3)
{printf("Please input the student's xue hao you want to search:");scanf("%d",&j);
for(i=1;L.stu[i].seat!=j&&i<=L.length;i++);
if(i<=L.length) print(&L,i);
else printf("There is none of the person\n");
}
if(k==4) break;
}
}还有 这个C语言学得好的话真的很好玩的 要认真学啊同学
❻ C语言课程设计学生成绩管理系统
这是昨晚一个人找我做的，他给了我一百块钱买我的代码，现在我不要你的钱了，你采纳我我就发代码给你
❼ c语言课程设计学生成绩管理系统
直接在网络上搜 有 你不必在提问了