課程設計計算器

1. C語言課程設計，簡單計算器

#include<stdio.h>
voidmain()
{
inta,b;
charch;
scanf("%d%c%d",&a,&ch,&b);
switch(ch)
{
case'+':printf("%d",a+b);break;
case'-':printf("%d",a-b);break;
case'*':printf("%d",a*b);break;
case'/':
{
if(b==0)printf("算式無抄意義");
elseprintf("%f",float(a)/b);
break;
}
default:printf("輸入的運算符有誤!");
}
}

2. 計算機課程設計 用JAVA做計算器

聯系我嘛，
這個沒什麼問題。
就是用JFrame嘛？

3. JAVA課程設計--簡易計算器. 求源代碼.

import javax.swing.*;//新的窗口組件包
import java.awt.*;
import java.awt.event.*;
public class Jisuanqi implements ActionListener
{ JFrame jf=new JFrame();
boolean dotExist, operated, equaled; // 幫助運算的布爾變數
double result; // 目前的結果
char lastOperator; // 表示上一運算符
JTextField jtf; // 顯示欄
JButton dot, plus, minus, multi, div, sqrt, equal, change, clear,quyu; // 運算符
JButton[] numbers;
Panel p=new Panel();
// 構造者
public Jisuanqi()
{
jf.setTitle("陳巳偉牌計算器");
// 初始化變數
dotExist = false; // 表示當前的數是否有小數點
operated = false; // 表示任意運算符是否被按下
equaled = false; // 表示等號是否被按下
result = 0;
lastOperator = '?';
// 初始化窗口變數
jtf = new JTextField("0");
jtf.setEditable(false); //設置文本框的可編輯性
jf.setSize(250,200);
jf.setVisible(true);
numbers = new JButton[10];
for (int i = 0; i < 10; i++)
numbers[i] = new JButton("" + i);
dot = new JButton(".");
plus = new JButton("+");
minus = new JButton("-");

multi = new JButton("*");
div = new JButton("/");
sqrt = new JButton("√");
equal = new JButton("=");
change= new JButton("±");
clear = new JButton("NC");
quyu=new JButton("%");

p.setLayout(new GridLayout(5,4));
p.add(numbers[1]);
p.add(numbers[2]);
p.add(numbers[3]);
p.add(plus);
p.add(numbers[4]);
p.add(numbers[5]);
p.add(numbers[6]);
p.add(minus);
p.add(numbers[7]);
p.add(numbers[8]);
p.add(numbers[9]);
p.add(multi);
p.add(dot);
p.add(numbers[0]);
p.add(sqrt);
p.add(div);
p.add(equal);
p.add(change);
p.add(clear);
p.add(quyu);
jf.add(jtf,BorderLayout.NORTH);
jf.add(p,BorderLayout.CENTER);
numbers[0].addActionListener(this);
numbers[1].addActionListener(this);
numbers[2].addActionListener(this);
numbers[3].addActionListener(this);
plus.addActionListener(this);
numbers[4].addActionListener(this);
numbers[5].addActionListener(this);
numbers[6].addActionListener(this);
minus.addActionListener(this);
numbers[7].addActionListener(this);
numbers[8].addActionListener(this);
numbers[9].addActionListener(this);
multi.addActionListener(this);
dot.addActionListener(this);
sqrt.addActionListener(this);
div.addActionListener(this);
equal.addActionListener(this);
change.addActionListener(this);
clear.addActionListener(this);
quyu.addActionListener(this);

}
// 對按鈕進行反應的方法
public void actionPerformed(ActionEvent e)
{
JButton btn = (JButton)e.getSource();
if (btn == clear)
{
jtf.setText("0");
dotExist = false;
operated = false;
equaled = false;
result = 0;
lastOperator = '?';
}
else if (btn == equal)
{
operate('=');
equaled = true;
}
else if (btn == plus)
{
operate('+');
equaled = false;
}
else if (btn == minus)
{
operate('-');
equaled = false;
}
else if (btn == multi)
{
operate('*');
equaled = false;
}
else if (btn == div)
{
operate('/');
equaled = false;
}
else if (btn==quyu){
operate('%');
equaled=false;
}
else if (btn == change)
{
operate('p');
operate('=');
equaled = true;
}
else if (btn == sqrt)
{
operate('s');
operate('=');
equaled = true;
}
else
{
if (equaled)
result = 0;
for (int i = 0; i < 10; i++)
if (btn == numbers[i])
{
if (jtf.getText().equals("0"))
jtf.setText("" + i);
else if(! operated)
jtf.setText(jtf.getText() + i);
else
{
jtf.setText("" + i);
operated = false;
}
}
if (btn == dot && ! dotExist)
{
jtf.setText(jtf.getText() + ".");

}
}
}
// 進行運算的方法
private void operate(char operator)
{
double currentNumber = Double.valueOf(jtf.getText()).doubleValue();
if (lastOperator == '?')
result = currentNumber;
else if (lastOperator == '+')
result += currentNumber;
else if (lastOperator == '-')
result -= currentNumber;
else if (lastOperator == '*')
result *= currentNumber;
else if (lastOperator == '/')
result /= currentNumber;
else if(lastOperator=='%')
result %=currentNumber;
else if (lastOperator == 'p')
result *= -1;
else if (lastOperator == 's')
result = Math.sqrt(currentNumber);
else if (lastOperator == '=' && equaled)
result = currentNumber;
jtf.setText("" + result);
operated = true;
lastOperator = operator;
}

public static void main(String[] args)
{new Jisuanqi();<br> <br> }
}

4. "C語言課程設計--算術計算器的實現"怎麼做

#include<stdio.h>
#include<malloc.h>
#include<iostream.h>

struct node
{
int date;
struct node *next;
};
typedef struct node *link;
link number=NULL;
link symble=NULL;
//把數據放入棧中//
link push(link stack ,int num,int k)
{ link newnode;
newnode=(link)malloc(sizeof(struct node));
if(newnode==NULL)
cout<<"out of space"<<endl;
else
{ if(k>=0 && k<=9)//判斷前一個字元是否為數字
{
stack->date=stack->date*10+num;
return stack;
}
else
{
newnode->date=num;
newnode->next=stack;
stack=newnode;
return stack;

}
}
}

//從棧上取出數據//
link pull(link stack,int *num)
{
link top;//去棧頂元素
if(stack!=NULL)
{
top=stack;
stack=stack->next;
*num=top->date;
free(top);
return stack;

}
else
*num=0;

}
//判斷棧是否為空
int empty(link stack)
{
if(stack==NULL)
return 1;
else
return 0;

}
//判斷是否為運算符
int is_symble(char ch)
{
switch(ch)
{ case '(':
case ')':
case '+':
case '-':
case '*':
case '/':
return 1;
default:
return 0;
}

}
// 判斷運算符的優先順序
int priority(char ch)
{
switch(ch)
{ case '(':
return 1;
case '+':
case '-':return 2;
case '*':
case '/': return 3;//'+','-'的優先順序小於'*','/'
default:return 0;
}

}
//計算兩個操作數的值
int tuo_result(int m,int num1,int num2 )
{ switch(m)
{ case '+':
return(num2 + num1);
case '-':
return (num2-num1);
case '*':
return(num2 * num1);
case '/':
return(num2 / num1);
}

}

//主函數
void main ()
{
char expression[50];//存放表達式
int position=0;//表達式的位置
int sym=0;//運算符
int num1=0;//後操作數
int num2=0;//前操作數
int sum=0;//運算結果
cout<<"請輸入表達式："<<endl;
gets(expression);
while(expression[position]!='\0' && expression[position]!='\n')
{ if(is_symble(expression[position]))//判斷運算符
{
if(expression[position]=='(')
symble=push(symble,expression[position],-1);
else if(expression[position]==')')
{ while(symble->date!='(')
{ number=pull(number,&num1);
number=pull(number,&num2);
symble=pull(symble,&sym);
number=push(number,tuo_result(sym,num1,num2),-1);
}
//if(symble->date='(')symble=pull(symble,&sym);
symble=pull(symble,&sym);

}

else if(!empty(symble))//判斷放運算符的棧是否為空

{ if(priority(expression[position]) <= priority(symble->date) &&
!empty(symble))
{
//取出一個運算符和兩個操作數
number=pull(number,&num1);
number=pull(number,&num2);
symble=pull(symble,&sym);
number=push(number,tuo_result(sym,num1,num2),-1);
//cout<<tuo_result(sym,num1,num2)<<endl;
//把運算符放在棧里
//symble=push(symble,expression[position],-1);
}
symble=push(symble,expression[position],-1);
}

//把運算符放在棧里
else
symble=push(symble,expression[position],-1);

}
else if(!is_symble(expression[position]))//把操作數放在棧里
number=push(number,expression[position]-48,expression[position-1]-48);
//cout<<expression[position]<<endl;

position++;
}

//取出運算符棧的運算符
while(!empty(symble))
{ //cout<<symble->date<<endl;

symble=pull(symble,&sym);
if(!empty(symble))//判斷是否為空
{
if(sym=='+' && symble->date=='-' )//判斷符號問題 ，2-2*3+5=1不然就是-1
sym='-';
}
number=pull(number,&num1);
number=pull(number,&num2);

//cout<<num1<<" "<<num2<<endl;
//計算的結果放在棧中
number=push(number, tuo_result(sym,num1,num2),-1);
//cout<<number->date<<endl;

}
//取出運算結果
number=pull(number,&sum);
cout<<expression<<"="<<sum<<endl;

}

5. java課程設計---計算器 要求如下：

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.border.*;
import java.util.LinkedList;
import java.io.*;
public class CalculatorWindow extends JFrame implements ActionListener{
NumberButton numberButton[];
OperationButton operationButton[];
JButton 小數點操作,正負號操作,退格操作,等號操作,清零操作,sin;
JTextField resultShow; //顯示計算結果
JTextField showComputerProcess; //顯示當前計算過程
JTextArea saveComputerProcess; //顯示計算步驟
JButton saveButton,Button,clearButton;
LinkedList<String> list; //鏈表用來存放第一個運算數、運算符號和第二個運算數
HandleDigit handleDigit; //負責處理ActionEvent事件
HandleOperation handleOperation ;
HandleBack handleBack;
HandleClear handleClear;
HandleEquality handleEquality;
HandleDot handleDot;
HandlePOrN handlePOrN;
HandleSin handleSin;
public CalculatorWindow(){
setTitle("計算器");
JPanel panelLeft,panelRight;
list=new LinkedList<String>();
resultShow=new JTextField(10);
resultShow.setHorizontalAlignment(JTextField.RIGHT);
resultShow.setForeground(Color.blue);
resultShow.setFont(new Font("TimesRoman",Font.BOLD,16));
resultShow.setBorder(new SoftBevelBorder(BevelBorder.LOWERED));
resultShow.setEditable(false);
resultShow.setBackground(Color.white);
showComputerProcess=new JTextField();
showComputerProcess.setHorizontalAlignment(JTextField.CENTER);
showComputerProcess.setFont(new Font("Arial",Font.BOLD,16));
showComputerProcess.setBackground(Color.cyan);
showComputerProcess.setEditable(false);
saveComputerProcess=new JTextArea();
saveComputerProcess.setEditable(false);
saveComputerProcess.setFont(new Font("宋體",Font.PLAIN,16));
numberButton=new NumberButton[10];
handleDigit=new HandleDigit(list,resultShow,showComputerProcess);
for(int i=0;i<=9;i++){
numberButton[i]=new NumberButton(i);
numberButton[i].setFont(new Font("Arial",Font.BOLD,20));
numberButton[i].addActionListener(handleDigit);
}
operationButton=new OperationButton[4];
handleOperation=new HandleOperation(list,resultShow,
showComputerProcess,saveComputerProcess);
String 運算符號[]={"+","-","*","/"};
for(int i=0;i<4;i++){
operationButton[i]=new OperationButton(運算符號[i]);
operationButton[i].setFont(new Font("Arial",Font.BOLD,20));
operationButton[i].addActionListener(handleOperation);
}
小數點操作=new JButton(".");
handleDot=new HandleDot(list,resultShow,showComputerProcess);
小數點操作.addActionListener(handleDot);
正負號操作=new JButton("+/-");
handlePOrN=new HandlePOrN(list,resultShow,showComputerProcess);
正負號操作.addActionListener(handlePOrN);
等號操作=new JButton("=");
handleEquality=new HandleEquality(list,resultShow,
showComputerProcess,saveComputerProcess);
等號操作.addActionListener(handleEquality);
sin=new JButton("sin");
handleSin=new HandleSin(list,resultShow,
showComputerProcess,saveComputerProcess);
sin.addActionListener(handleSin);
退格操作=new JButton("退格");
handleBack=new HandleBack(list,resultShow,showComputerProcess);
退格操作.addActionListener(handleBack);
清零操作=new JButton("C");
handleClear=new HandleClear(list,resultShow,showComputerProcess);
清零操作.addActionListener(handleClear);
清零操作.setForeground(Color.red);
退格操作.setForeground(Color.red);
等號操作.setForeground(Color.red);
sin.setForeground(Color.blue);
正負號操作.setForeground(Color.blue);
小數點操作.setForeground(Color.blue);
panelLeft=new JPanel();
panelRight=new JPanel();
panelLeft.setLayout(new BorderLayout());
JPanel centerInLeft=new JPanel();
panelLeft.add(resultShow,BorderLayout.NORTH);
panelLeft.add(centerInLeft,BorderLayout.CENTER);
centerInLeft.setLayout(new GridLayout(4,5));
centerInLeft.add(numberButton[1]);
centerInLeft.add(numberButton[2]);
centerInLeft.add(numberButton[3]);
centerInLeft.add(operationButton[0]);
centerInLeft.add(清零操作);
centerInLeft.add(numberButton[4]);
centerInLeft.add(numberButton[5]);
centerInLeft.add(numberButton[6]);
centerInLeft.add(operationButton[1]);
centerInLeft.add(退格操作);
centerInLeft.add(numberButton[7]);
centerInLeft.add(numberButton[8]);
centerInLeft.add(numberButton[9]);
centerInLeft.add(operationButton[2]);
centerInLeft.add(sin);
centerInLeft.add(numberButton[0]);
centerInLeft.add(正負號操作);
centerInLeft.add(小數點操作);
centerInLeft.add(operationButton[3]);
centerInLeft.add(等號操作);
panelRight.setLayout(new BorderLayout());
panelRight.add(showComputerProcess,BorderLayout.NORTH);
saveButton=new JButton("保存");
Button=new JButton("復制");
clearButton=new JButton("清除");
saveButton.setToolTipText("保存計算過程到文件");
Button.setToolTipText("復制選中的計算過程");
clearButton.setToolTipText("清除計算過程");
saveButton.addActionListener(this);
Button.addActionListener(this);
clearButton.addActionListener(this);
panelRight.add(new JScrollPane(saveComputerProcess),BorderLayout.CENTER);
JPanel southInPanelRight=new JPanel();
southInPanelRight.add(saveButton);
southInPanelRight.add(Button);
southInPanelRight.add(clearButton);
panelRight.add(southInPanelRight,BorderLayout.SOUTH);
JSplitPane split=new JSplitPane
(JSplitPane.HORIZONTAL_SPLIT,panelLeft,panelRight);
add(split,BorderLayout.CENTER);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setVisible(true);
setBounds(100,50,528,258);
validate();
}
public void actionPerformed(ActionEvent e){
if(e.getSource()==Button)
saveComputerProcess.();
if(e.getSource()==clearButton)
saveComputerProcess.setText(null);
if(e.getSource()==saveButton){
JFileChooser chooser=new JFileChooser();
int state=chooser.showSaveDialog(null);
File file=chooser.getSelectedFile();
if(file!=null&&state==JFileChooser.APPROVE_OPTION){
try{ String content=saveComputerProcess.getText();
StringReader read=new StringReader(content);
BufferedReader in= new BufferedReader(read);
FileWriter outOne=new FileWriter(file);
BufferedWriter out= new BufferedWriter(outOne);
String str=null;
while((str=in.readLine())!=null){
out.write(str);
out.newLine();
}
in.close();
out.close();
}
catch(IOException e1){}
}
}
}
public static void main(String args[]){
new CalculatorWindow();
}
}