【opencv源码安装】【磐石云群呼源码】【sigh超级签名源码】科学计算器源码

【opencv源码安装】【磐石云群呼源码】【sigh超级签名源码】科学计算器源码_科学计算器源码怎么用

时间：2024-11-20 17:21:32 编辑：网页源码的object 来源：ssm框架源码全集

1.用JAVA编写的科学科学计算器源代码
2.JAVA课程设计计算器的源代码
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科学计算器源码_科学计算器源码怎么用

用JAVA编写的科学计算器源代码

这个你参考一下。

import javax.swing.*;

//import javax.swing.event.*;

import java.awt.*;

import java.awt.event.*;

//计算器显示结果的计算窗体

class Result extends JPanel

{

JTextField text = new JTextField("0"); //text先是输入和结果

Result()

{

text.setHorizontalAlignment(SwingConstants.RIGHT); //讲输入的数字或得到的结果在text的右边显示

text.setEnabled(false); //文本框不能编辑

setLayout(new BorderLayout()); //设定布局管理器边框布局

add(text, BorderLayout.CENTER); //text放置在窗体的中间

}

//计算器数字按钮定义面板

class Number_Key extends JPanel

{

JButton zero = new JButton("0");//数字键0

JButton one = new JButton("1");//数字键1

JButton two = new JButton("2");//数字键2

JButton three = new JButton("3");//数字键3

JButton four = new JButton("4");//数字键4

JButton five = new JButton("5");//数字键5

JButton six = new JButton("6");//数字键6

JButton seven = new JButton("7");//数字键7

JButton eight = new JButton("8");//数字键8

JButton nine = new JButton("9");//数字键9

JButton plus = new JButton("+");

JButton sub = new JButton("-");

JButton mul = new JButton("*");

JButton div = new JButton("/");

JButton equal = new JButton("=");

JButton ce = new JButton("ce");//置零键

JButton point = new JButton(".");

JButton tzero = new JButton("");

Number_Key()

{

setLayout(new GridLayout(6, 3, , ));//定义布局管理器为网格布局

//添加各个按钮键

add(seven);

add(eight);

add(nine);

add(four);

add(five);

add(six);

add(one);

add(two);

add(three);

add(zero);

add(tzero);

add(plus);

add(sub);

add(mul);

add(div);

add(point);

add(equal);

add(ce);

}

//计算器主类

class sakura extends JFrame implements ActionListener

{

Result result = new Result();//定义text的面板

Number_Key number_key = new Number_Key();//定义按钮面板

//当点击按钮+、-、器源*、码科opencv源码安装/时，学计com = true

boolean com = false;

//当i=0时说明是算器磐石云群呼源码我们第一次输入，字符串sum不会累加

int i = 0;

//存放text的源码用内容

String sum = "";

//存放点击按钮+、-、科学*、计算/之前的器源数值

double total = 0;

//+、-、码科*、学计/的算器sigh超级签名源码代号分别为1，2，源码用3，科学4

int symbol = 0;

sakura()

{

super("Calculator");//设定标题

setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);//设定关闭窗体时退出程序

JPanel pane = new JPanel();//定义主面板

pane.setLayout(new BorderLayout());

pane.add(result,减法主页源码下载 BorderLayout.NORTH);

pane.add(number_key, BorderLayout.SOUTH);

number_key.one.addActionListener(this);//对1按钮添加监听事件

number_key.two.addActionListener(this);//对2按钮添加监听事件

number_key.three.addActionListener(this);//对3按钮添加监听事件

number_key.four.addActionListener(this);//对4按钮添加监听事件

number_key.five.addActionListener(this);//对5按钮添加监听事件

number_key.six.addActionListener(this);//对6按钮添加监听事件

number_key.seven.addActionListener(this);//对7按钮添加监听事件

number_key.eight.addActionListener(this);//对8按钮添加监听事件

number_key.nine.addActionListener(this);//对9按钮添加监听事件

number_key.zero.addActionListener(this);//对0按钮添加监听事件

number_key.ce.addActionListener(this);//对置零按钮添加监听事件

number_key.plus.addActionListener(this);//对+按钮添加监听事件

number_key.equal.addActionListener(this);//对=按钮添加监听事件

number_key.sub.addActionListener(this);//对-按钮添加监听事件

number_key.mul.addActionListener(this);//对*按钮添加监听事件

number_key.div.addActionListener(this);//对/按钮添加监听事件

number_key.tzero.addActionListener(this);//对按钮添加监听事件

number_key.point.addActionListener(this);//对.按钮添加监听事件

setContentPane(pane);

pack();//初始化窗体大小为正好盛放所有按钮

}

//各个按钮触发的事件

public void actionPerformed(ActionEvent e) {

/*如果是点击数字按钮那么先要判断是否在此之前点击了+、-、*、/、付费相册网站源码=，如果是那么com=true

* 如果没有com= false;或者是否点击数字键，如果是i = 1,如果没有 i = 0;

**/

if (e.getSource() == number_key.one)

{

if (com || i == 0)

{

result.text.setText("1");

com = false;

i = 1;

}

else

{

sum = result.text.getText();

result.text.setText(sum + "1");

}

else if (e.getSource() == number_key.two)

{

if (com || i == 0)

{

result.text.setText("2");

com = false;

i = 1;

}

else

{

sum = result.text.getText();

result.text.setText(sum + "2");

}

else if (e.getSource() == number_key.three)

{

if (com || i == 0)

{

result.text.setText("3");

com = false;

i = 1;

}

else

{

sum = result.text.getText();

result.text.setText(sum + "3");

}

else if (e.getSource() == number_key.four)

{

if (com || i == 0)

{

result.text.setText("4");

com = false;

i = 1;

}

else

{

sum = result.text.getText();

result.text.setText(sum + "4");

}

else if (e.getSource() == number_key.five)

{

if (com || i == 0)

{

result.text.setText("5");

com = false;

i = 1;

}

else

{

sum = result.text.getText();

result.text.setText(sum + "5");

}

else if (e.getSource() == number_key.six)

{

if (com || i == 0)

{

result.text.setText("6");

com = false;

i = 1;

}

else

{

sum = result.text.getText();

result.text.setText(sum + "6");

}

else if (e.getSource() == number_key.seven)

{

if (com || i == 0)

{

result.text.setText("7");

com = false;

i = 1;

}

else

{

sum = result.text.getText();

result.text.setText(sum + "7");

}

else if (e.getSource() == number_key.eight)

{

if (com || i == 0)

{

result.text.setText("8");

com = false;

i = 1;

}

else

{

sum = result.text.getText();

result.text.setText(sum + "8");

}

else if (e.getSource() == number_key.nine)

{

if (com || i == 0)

{

result.text.setText("9");

com = false;

i = 1;

}

else

{

sum = result.text.getText();

result.text.setText(sum + "9");

}

/*对于0这个按钮有一定的说法，在我的程序里不会出现如这样的情况，我加了判断条件就是

* 如果text中的数值=0就要判断在这个数值中是否有.存在?如果有那么就在原来数值基础之上添

* 加0;否则保持原来的数值不变

else if (e.getSource() == number_key.zero)

{

if (com || i == 0)

{

result.text.setText("0");

com = false;

i = 1;

}

else

{

sum = result.text.getText();

if (Float.parseFloat(sum) > 0 || Float.parseFloat(sum) < 0)

{

result.text.setText(sum + "0");

}

else

{

if (sum.trim().indexOf(".") == -1)

{

result.text.setText(sum);

}

else

{

result.text.setText(sum + "0");

}

else if (e.getSource() == number_key.ce)

{

result.text.setText("0");

i = 0;

com = true;

}

else if (e.getSource() == number_key.tzero)

{

if (com || i == 0)

{

result.text.setText("0");

com = false;

i = 1;

}

else

{

sum = result.text.getText();

if (Float.parseFloat(sum) > 0 || Float.parseFloat(sum) < 0)

{

result.text.setText(sum + "");

}

else

{

if (sum.trim().indexOf(".") == -1)

{

result.text.setText(sum);

}

else

{

result.text.setText(sum + "");

}

/*本程序不会让一个数值中出现2个以上的小数点.具体做法是:判断是否已经存在.存在就不添加,

* 不存在就添加.

else if (e.getSource() == number_key.point)

{

if (com || i == 0)

{

result.text.setText("0.");

com = false;

i = 1;

}

else

{

sum = result.text.getText();

if (sum.trim().indexOf(".") == -1)

{

result.text.setText(sum + ".");

}

else

{

result.text.setText(sum);

}

//获得点击+之前的数值

else if (e.getSource() == number_key.plus)

{

com = true;

i = 0;

total = Double.parseDouble(result.text.getText());

symbol = 1;

}//获得点击-之前的数值

else if (e.getSource() == number_key.sub)

{

com = true;

i = 0;

total = Double.parseDouble(result.text.getText());

symbol = 2;

}//获得点击*之前的数值

else if (e.getSource() == number_key.mul)

{

com = true;

i = 0;

total = Double.parseDouble(result.text.getText());

System.out.println(total);

symbol = 3;

}//获得点击/之前的数值

else if (e.getSource() == number_key.div)

{

com = true;

i = 0;

total = Double.parseDouble(result.text.getText());

symbol = 4;

}

else if (e.getSource() == number_key.equal)

{

switch (symbol)

{

case 1 ://计算加法

{

double ad =

total + Double.parseDouble(result.text.getText());

result.text.setText(ad + "");

i = 0;

sum = "";

break;

}

case 2 ://计算减法

{

double ad =

total - Double.parseDouble(result.text.getText());

result.text.setText(String.valueOf(ad));

i = 0;

sum = "";

break;

}

case 3 ://计算乘法

{

double ad =

total * Double.parseDouble(result.text.getText());

result.text.setText(ad + "");

i = 0;

sum = "";

break;

}

case 4 ://计算除法

{

double ad =

total / Double.parseDouble(result.text.getText());

result.text.setText(ad + "");

i = 0;

sum = "";

break;

}

System.out.println(com);

}

public static void main(String[] args)

{

sakura ww = new sakura();

ww.setVisible(true) ;

}

JAVA课程设计计算器的源代码

比较完整的Java计算器

import javax.swing.*;

import javax.swing.event.*;

import java.awt.*;

import java.awt.event.*;

public class calculator extends JFrame implements ActionListener

{ //这里我把JFrame写成Frame，这个错误找了好久

JFrame frame;

private JButton jia=new JButton("+");

private JButton jian=new JButton("-");

private JButton cheng=new JButton("*");

private JButton chu=new JButton("/");

private JButton qiuyi=new JButton("%");

private JButton deng=new JButton("=");

private JButton fu=new JButton("+/-");

private JButton dian=new JButton(".");

private JButton kai=new JButton("sqrt");

private JButton diao=new JButton("1/x");

private JButton aa=new JButton("A");

private JButton bb=new JButton("B");

private JButton cc=new JButton("C");

private JButton dd=new JButton("D");

private JButton ee=new JButton("E");

private JButton ff=new JButton("F");

private TextField k1=new TextField();

private objConversion convert = new objConversion();

JMenuItem copy,paste,s,t,help,about,me;

JRadioButton sixteen,ten,eight,two;

JButton backspace,ce,c,num0,num1,num2,num3,num4,num5,num6,num7,num8,num9;

Container cp;

JTextField text;

String copycontent="";

boolean clickable=true,clear=true;

int all=0;

double qian;

String fuhao;

int jin=,first=1;

public calculator()

{

setTitle("计算器－杨彩制作");

setSize(,);

setLocation(,);

text=new JTextField();

// text.setEnabled(false);

text.setText("0.");

text.setHorizontalAlignment(JTextField.RIGHT);//从右到左

JPanel cp1=new JPanel();

JPanel cp2=new JPanel();

JPanel cp3=new JPanel();

cp=getContentPane();

cp.add(cp1,"North");

cp.add(cp2,"Center");

cp.add(cp3,"South");

cp1.setLayout(new GridLayout(1,6));

cp2.setLayout(new GridLayout(2,4));

cp3.setLayout(new GridLayout(6,6));

sixteen=new JRadioButton("十六进制");

sixteen.setVisible(false);

ten=new JRadioButton("十进制",true);

ten.setVisible(false);

eight=new JRadioButton("八进制");

eight.setVisible(false);

two=new JRadioButton("二进制");

two.setVisible(false);

sixteen.addActionListener(this);

ten.addActionListener(this);

eight.addActionListener(this);

two.addActionListener(this);

ButtonGroup btg=new ButtonGroup();

btg.add(sixteen);

btg.add(ten);

btg.add(eight);

btg.add(two);

JTextField t3=new JTextField();

cp1.add(text);

// text.setEnabled(false);

text.setEditable(false);

text.setBackground(new Color(, , ));

cp2.add(sixteen);

cp2.add(ten);

cp2.add(eight);

cp2.add(two);

backspace=new JButton("Backspace");

backspace.setForeground(new Color(,0,0));

backspace.addActionListener(this);

ce=new JButton("CE");

ce.setForeground(new Color(,0,0));

ce.addActionListener(this);

c=new JButton("C");

c.setForeground(new Color(,0,0));

c.addActionListener(this);

k1.setVisible(false);

cp2.add(k1);

cp2.add(backspace);

cp2.add(ce);

cp2.add(c);

num0=new JButton("0");

num1=new JButton("1");

num2=new JButton("2");

num3=new JButton("3");

num4=new JButton("4");

num5=new JButton("5");

num6=new JButton("6");

num7=new JButton("7");

num8=new JButton("8");

num9=new JButton("9");

cp3.add(num7);

num7.addActionListener(this);

cp3.add(num8);

num8.addActionListener(this);

cp3.add(num9);

num9.addActionListener(this);

cp3.add(chu);

chu.setForeground(new Color(,0,0));

chu.addActionListener(this);

cp3.add(kai);

kai.addActionListener(this);

cp3.add(num4);

num4.addActionListener(this);

cp3.add(num5);

num5.addActionListener(this);

cp3.add(num6);

num6.addActionListener(this);

cp3.add(cheng);

cheng.setForeground(new Color(,0,0));

cheng.addActionListener(this);

cp3.add(qiuyi);

qiuyi.addActionListener(this);

cp3.add(num1);

num1.addActionListener(this);

cp3.add(num2);

num2.addActionListener(this);

cp3.add(num3);

num3.addActionListener(this);

cp3.add(jian);

jian.setForeground(new Color(,0,0));

jian.addActionListener(this);

cp3.add(diao);

diao.addActionListener(this);

cp3.add(num0);

num0.addActionListener(this);

cp3.add(fu);

fu.addActionListener(this);

cp3.add(dian);

dian.addActionListener(this);

cp3.add(jia);

jia.setForeground(new Color(,0,0));

jia.addActionListener(this);

cp3.add(deng);

deng.setForeground(new Color(,0,0));

deng.addActionListener(this);

cp3.add(aa);

aa.addActionListener(this);

cp3.add(bb);

bb.addActionListener(this);

cp3.add(cc);

cc.addActionListener(this);

cp3.add(dd);

dd.addActionListener(this);

cp3.add(ee);

ee.addActionListener(this);

cp3.add(ff);

ff.addActionListener(this);

aa.setVisible(false);

bb.setVisible(false);

cc.setVisible(false);

dd.setVisible(false);

ee.setVisible(false);

ff.setVisible(false);

JMenuBar mainMenu = new JMenuBar();

setJMenuBar(mainMenu);

JMenu editMenu = new JMenu("编辑");

JMenu viewMenu = new JMenu("查看");

JMenu helpMenu = new JMenu("帮助");

mainMenu.add(editMenu);

mainMenu.add(viewMenu);

mainMenu.add(helpMenu);

copy = new JMenuItem(" 复制");

paste = new JMenuItem(" 粘贴");

KeyStroke copyks=KeyStroke.getKeyStroke(KeyEvent.VK_C,Event.CTRL_MASK);

copy.setAccelerator(copyks);//设置退出菜单选项加上快捷键

KeyStroke pasteks=KeyStroke.getKeyStroke(KeyEvent.VK_V,Event.CTRL_MASK);

paste.setAccelerator(pasteks);//设置退出菜单选项加上快捷键

editMenu.add(copy);

editMenu.add(paste);

copy.addActionListener(this);

paste.addActionListener(this);

t = new JMenuItem("●标准型");

s = new JMenuItem(" 科学型");

viewMenu.add(t);

viewMenu.add(s);

t.addActionListener(this);

s.addActionListener(this);

help = new JMenuItem(" 帮助主题");

about = new JMenuItem(" 关于计算器");

me = new JMenuItem(" 作者主页");

helpMenu.add(help);

helpMenu.add(about);

helpMenu.add(me);

help.addActionListener(this);

about.addActionListener(this);

me.addActionListener(this);

addWindowListener(new WindowDestroyer());//结束窗口

}

public void actionPerformed(ActionEvent e)

{ //响应动作代码

if(first==1)

text.setText("");

first=0;//第一次把文本框0.清空

Object temp = e.getSource();

if(temp==copy)

{

copycontent = text.getText();

}

if(temp==paste)

{

text.setText(text.getText()+copycontent);

}

if(temp==t)

{ //标准

sixteen.setVisible(false);

ten.setVisible(false);

eight.setVisible(false);

two.setVisible(false);

t.setText("●标准型");

s.setText(" 科学型");

aa.setVisible(false);

bb.setVisible(false);

cc.setVisible(false);

dd.setVisible(false);

ee.setVisible(false);

ff.setVisible(false);

}

if(temp==s)

{ //科学

sixteen.setVisible(true);

ten.setVisible(true);

eight.setVisible(true);

two.setVisible(true);

t.setText(" 标准型");

s.setText("●科学型");

aa.setVisible(true);

bb.setVisible(true);

cc.setVisible(true);

dd.setVisible(true);

ee.setVisible(true);

ff.setVisible(true);

aa.setEnabled(false);

bb.setEnabled(false);

cc.setEnabled(false);

dd.setEnabled(false);

ee.setEnabled(false);

ff.setEnabled(false);

}

if(temp==help)

{ //打开系统帮助文件要查资料

try

{

String filePath = "C:/WINDOWS/Help/calc.chm";

Runtime.getRuntime().exec("cmd.exe /c "+filePath);

}

catch(Exception eeee)

{

System.out.println("打开系统的计算器出错");

}

if(temp==about)

{

JOptionPane.showMessageDialog(frame," Java计算器\n 杨彩制作\n\n /m/yangcai","关于计算器",JOptionPane.INFORMATION_MESSAGE); ;

}

if(temp==me)

{

try

{

Process p = Runtime.getRuntime().exec("explorer /m/yangcai");

}

catch(Exception eeee)

{

System.out.println("打开指定网页出错");

}

try

{

if(temp==sixteen)

{

String hex=text.getText();

int inthex=Integer.parseInt(hex,jin);//先把数变为进制

text.setText(convert.decHex(inthex)) ;

jin=;

aa.setEnabled(true);

bb.setEnabled(true);

cc.setEnabled(true);

dd.setEnabled(true);

ee.setEnabled(true);

ff.setEnabled(true);

num2.setEnabled(true);

num3.setEnabled(true);

num4.setEnabled(true);

num5.setEnabled(true);

num6.setEnabled(true);

num7.setEnabled(true);

num8.setEnabled(true);

num9.setEnabled(true);

}

if(temp==eight)

{

String oct =text.getText();

int intoct=Integer.parseInt(oct,jin);

text.setText(convert.decOct(intoct)) ;

jin=8;

aa.setEnabled(false);

bb.setEnabled(false);

cc.setEnabled(false);

dd.setEnabled(false);

ee.setEnabled(false);

ff.setEnabled(false);

num2.setEnabled(true);

num3.setEnabled(true);

num4.setEnabled(true);

num5.setEnabled(true);

num6.setEnabled(true);

num7.setEnabled(true);

num8.setEnabled(false);

num9.setEnabled(false);

}

if(temp==two)

{

String bin=text.getText();

int intbin=Integer.parseInt(bin,jin);

text.setText(convert.decBin(intbin));

jin=2;

aa.setEnabled(false);

bb.setEnabled(false);

cc.setEnabled(false);

dd.setEnabled(false);

ee.setEnabled(false);

ff.setEnabled(false);

num2.setEnabled(false);

num3.setEnabled(false);

num4.setEnabled(false);

num5.setEnabled(false);

num6.setEnabled(false);

num7.setEnabled(false);

num8.setEnabled(false);

num9.setEnabled(false);

}

if(temp==ten)

{

String dec=text.getText();

int intdec=Integer.parseInt(dec,jin);

// text.setText(convert.decDec(intdec)); //本句会把变成

text.setText(intdec+"");

jin=;

aa.setEnabled(false);

bb.setEnabled(false);

cc.setEnabled(false);

dd.setEnabled(false);

ee.setEnabled(false);

ff.setEnabled(false);

num2.setEnabled(true);

num3.setEnabled(true);

num4.setEnabled(true);

num5.setEnabled(true);

num6.setEnabled(true);

num7.setEnabled(true);

num8.setEnabled(true);

num9.setEnabled(true);

}

catch(Exception ee)

{

System.out.println("转换出错,可能你没有输入任何字符");

text.setText("转换出错");

clear=false;

}

if(temp==backspace)

{ //退格

String s = text.getText();

text.setText("");

for (int i = 0; i < s.length() - 1; i++)

{

char a = s.charAt(i);

text.setText(text.getText() + a);

}

if (temp==ce)

{

text.setText("0.");

clear=true;

first=1;

}

if (temp==c)

{

text.setText("0."); ;

clear=true;

first=1;

}

if(temp==num0)

{

if(clear==false)//判断是否点击了符号位

text.setText("");

text.setText(text.getText()+"0");

}

if(temp==num1)

{

if(clear==false)

text.setText("");

text.setText(text.getText()+"1");

clear=true;//第二次不在清空（前二句）

}

if(temp==num2)

{

if(clear==false)

text.setText("");

text.setText(text.getText()+"2");

clear=true;

}

if(temp==num3)

{

if(clear==false)

text.setText("");

text.setText(text.getText()+"3");

clear=true;

}

if(temp==num4)

{

if(clear==false)

text.setText("");

text.setText(text.getText()+"4");

clear=true;

}

if(temp==num5)

{

if(clear==false)

text.setText("");

text.setText(text.getText()+"5");

clear=true;

}

if(temp==num6)

{

if(clear==false)

text.setText("");

text.setText(text.getText()+"6");

clear=true;

}

if(temp==num7)

{

if(clear==false)

text.setText("");

text.setText(text.getText()+"7");

clear=true;

}

if(temp==num8)

{

if(clear==false)

text.setText("");

text.setText(text.getText()+"8");

clear=true;

}

if(temp==num9)

{

if(clear==false)

text.setText("");

text.setText(text.getText()+"9");

clear=true;

}

if(temp==aa)

{

text.setText(text.getText()+"A");

}

if(temp==bb)

{

text.setText(text.getText()+"B");

}

if(temp==cc)

{

text.setText(text.getText()+"C");

}

if(temp==dd)

{

text.setText(text.getText()+"D");

}

if(temp==ee)

{

text.setText(text.getText()+"E");

}

if(temp==ff)

{

text.setText(text.getText()+"F");

}

if(temp==dian)

{

clickable=true;

for (int i = 0; i < text.getText().length(); i++)

if ('.' == text.getText().charAt(i))

{

clickable=false;

break;

} //第一层判断是否里面含有小数点;

if(clickable==true)//第二坛判断

text.setText(text.getText()+".");

}

try

{

if(temp==jia)

{ //加法

qian=Double.parseDouble(text.getText());

fuhao="+";

clear=false;

}

if(temp==jian)

{

qian=Double.parseDouble(text.getText());

fuhao="-";

clear=false;

;

}

if(temp==cheng)

{

qian=Double.parseDouble(text.getText());

fuhao="*";

clear=false;

}

if(temp==chu)

{

qian=Double.parseDouble(text.getText());

fuhao="/";

clear=false;

}

if(temp==deng)

{

double ss=Double.parseDouble(text.getText());

text.setText("");

if(fuhao=="+")

text.setText(qian+ss+"");

if(fuhao=="-")

text.setText(qian-ss+"");

if(fuhao=="*")

text.setText(qian*ss+"");

if(fuhao=="/")

text.setText(qian/ss+"");

clear=false;//要清空前一次的数据

;

}

if(temp==kai)

{

String s = text.getText();

if (s.charAt(0) == '-')

{

text.setText("负数不能开根号");

}

else

text.setText(Double.toString(java.lang.Math.sqrt(Double.parseDouble(text.getText()))));

clear=false;

}

if(temp==diao)

{

if (text.getText().charAt(0) == '0'&&text.getText().length() == 1)

{

text.setText("除数不能为零");

}

else

{

boolean isDec = true;

int i, j, k;

String s = Double.toString(1 / Double.parseDouble(text.getText()));

for (i = 0; i < s.length(); i++)

if (s.charAt(i) == '.')

break;

for (j = i + 1; j < s.length(); j++)

if (s.charAt(j) != '0')

{

isDec = false;

break;

}

if (isDec == true)

{

String stemp = "";

for (k = 0; k < i; k++)

stemp += s.charAt(k);

text.setText(stemp);

}

else

text.setText(s);

}

clear=false;

}

if(temp==qiuyi)

{

text.setText("0");

clear=false;

}

if (temp == fu)

{ //导师，此方法参考书中例子

boolean isNumber = true;

String s = text.getText();

for (int i = 0; i < s.length(); i++)

if (! (s.charAt(i) >= '0' && s.charAt(i) <= '9' || s.charAt(i) == '.' ||

s.charAt(i) == '-'))

{

isNumber = false;

break;

}

if (isNumber == true)

{

//如果当前字符串首字母有'-'号,代表现在是个负数,再按下时,则将首符号去掉

if (s.charAt(0) == '-')

{

text.setText("");

for (int i = 1; i < s.length(); i++)

{

char a = s.charAt(i);

text.setText(text.getText() + a);

}

//如果当前字符串第一个字符不是符号，则添加一个符号在首字母处

else

text.setText('-' + s);

}

catch(Exception eee)

{

System.out.println("运算时,首先输入数字或字符");

text.setText("运算出错");

clear=false;

}

class WindowDestroyer extends WindowAdapter

{ //退出窗口动作

public void windowClosing(WindowEvent e)

{

System.exit(0);

}

class objConversion

{ //导师,本进制类参考了CSMD类转换例子

public void objConversion ()

{

}

public String decDec (int decNum)

{ //

String strDecNum = Integer.toString(decNum);

for (int i = strDecNum.length(); i < 3; i++)

{

strDecNum = "0" + strDecNum;

}

// return strDecNum;

return invert (strDecNum, 5);

}

public String decHex (int decNum)

{ // to

String strHexNum = "";

int currentNum = 0;

while (decNum != 0)

{

if (decNum > )

{

currentNum = decNum % ;

decNum /= ;

}

else

{

currentNum = decNum;

decNum = 0;

}

switch (currentNum)

{

case : strHexNum += "F";

break;

case : strHexNum += "E";

break;

case : strHexNum += "D";

break;

case : strHexNum += "C";

break;

case : strHexNum += "B";

break;

case : strHexNum += "A";

break;

default: strHexNum += Integer.toString(currentNum);

break;

}

return invert (strHexNum, 2);

}

public String decOct (int decNum)

{ // to 8

String strOctNum = "";

while (decNum != 0)

{

if (decNum > 7)

{

strOctNum += Integer.toString(decNum % 8);

decNum /= 8;

}

else

{

strOctNum += Integer.toString(decNum);

decNum = 0;

}

return invert (strOctNum, 3);

}

public String decBin (int decNum)

{ // to 2

String strBinNum = "";

while (decNum != 0)

{

if (decNum > 1)

{

strBinNum += Integer.toString(decNum % 2);

decNum /= 2;

}

else

{

strBinNum += Integer.toString(decNum);

decNum = 0;

}

return invert (strBinNum, 8);

}

private String invert (String strNum, int minLength) //转换长度

{

String answer = "";

int length = strNum.length();

if (length < minLength)

{

for (int padding = (minLength - length); padding > 0; padding--)

{

answer += "0";

}

for (int i = length; i > 0; i--)

{

answer += strNum.charAt (i - 1);

}

return answer;

}

public static void main(String arg[])//产生窗口

{

calculator win = new calculator();

win.setVisible(true);

}

å¦ä½ç¨Cè¯è¨ç¼åä¸ä¸ªç§å¦è®¡ç®å¨

#include <stdlib.h>

#include <string.h>

#define MAXSIZE ;

typedef struct

{

char data[];

int top;//å¤´å°å

int base;//åºå°å

int length;//é¿åº¦

}Stack;

void init(Stack *st)//åå§åæ

{

st->base=0;

st->top=0;

st->length=0;

}

int isEmpty(Stack *st)

{

int n=0,top,base;

top =st->top;

base =st->base;

if(top==base)

{

return 1;

}

return n;

}

int isFull(Stack *st)

{

int n=0,top,base;

top =st->top;

if(top>=)

{

return 1;

}

return n;

}

char getTop(Stack *st)// è¿åtopå¼ï¼ä¸æ¹åæ çç»æ

{

char n;

if(isEmpty(st))

{

return 0;

}

int positon= st->top-1;

n= st->data[positon];//ååºæ°æ®;

return n;

}

char pop(Stack *st)// åºæ ï¼è¿å

{

char n;

if(isEmpty(st))

{

return 0;

}

int positon= st->top-1;

n= st->data[positon];//ååºæ°æ®;

st->top--;

st->length--;

st->data[positon]='\0';//æ¶é¤æ°æ®

return n;

}

void push(char n,Stack *st)//å¥æ

{

int positon ;

if(isFull(st))

{

printf("æ æ»¡\n");

}

else

{

positon= st->top;//è·åä½ç½®

st->data[positon]=n;//åå¥æ°æ®

st->top++;//æ¹åä½ç½®

}

void show(Stack *m1)//è¾åºæ ä¸çæ°æ®

{

int top,base;

top=m1->top;

base=m1->base;

while(top>base)

{

printf("%c,",m1->data[--top]);

}

printf("\n");

}

int isOperate(char temp)//æ¯å¦æ¯æä½ç¬¦

{

if(temp=='+'||temp=='-'||temp=='*'||temp=='/'||temp=='('||temp==')'||temp=='#')

{

return 1;

}

return 0;

}

int isValue(char temp)//æ¯å¦æ¯æ°å¼

{

if(temp>='0'&&temp<='9')//

{

return 1;

}

else

{

return 0;

}

int isAvail(char temp)//æ¯å¦ææåç¬¦

{

if(isOperate(temp)||isValue(temp))//å¦ætempæ¢ä¸æ¯æä½ç¬¦åæ°å¼çè¯ï¼åå®æ¯éæ³ç

{

return 1;

}

return 0;

}

{

int i=0;

char oper[7]={ '+','-','*','/','(',')','#'};

for(i=0;i<7;i++)

{

if(temp==oper[i])

{

return i;

}

char Priority(char temp,char optr)//å¤æä¼åçº§

{

/**//

+ - * / ( ) #

1 2 3 4 5 6 7

+ 1 < < < < > > >

- 2 < < < < > > >

* 3 > > < < > > >

/ 4 > > < < > > >

( 5 > > > > > = 0

) 6 < < < < = 0 >

# 7 < < < < > 0 =

int row ,col;

char priority[7][7]={ /**//* + - * / ( ) # */

{ '<','<','<','<','>','>','>'},

{ '>','>','<','<','>','>','>'},

{ '>','>','>','>','>','=','>'},

{ '<','<','<','<','=','0','>'},

{ '<','<','<','<','>','<','='},

};

col = detect(optr);

// printf("%d,%d",row,col);

return priority[row][col];

}

char evaluate(int a,int b,char oper)

{

switch(oper)

{

case '+': return a+b+'0';

case '-': return a-b+'0';

case '*': return a*b+'0';

case '/': return a/b+'0';

default : return 0+'0';

}

int calculateExpress(char *express)//è®¡ç®è¡¨è¾¾å¼

{

int result=0;

int a,b;

// char oper,result;

Stack OPTR,OPND;//OPTRåå¨æä½ç¬¦ï¼OPNDæä½æ°å¼

init(&OPTR);

init(&OPND);

push('#',&OPTR);//é»è®¤ç¬¬ä¸ä¸ªä½'#'

////////////////////-ç®æ³-////////////////////////////

while(*express!='\0')

{

char temp;

temp= *(express);

printf("---------------------------------\n");

printf("å½åçç¬¦å·ä¸º%c\n",temp);

if(isAvail(temp))//æ¯å¦æ¯ææåç¬¦

{

if(isOperate(temp) )//è¾å¥çæ¯æä½ç¬¦

{

char oper,result;

char optr = getTop(&OPTR);//æ ä¸topä½çæä½ç¬¦

printf("æ é¡¶æä½ç¬¦ä½ï¼%c\n",optr);

char prior = Priority(temp,optr);//å¤æä¼åçº§

switch(prior)

{

case '>':

push(temp,&OPTR);

printf("å°ç¬¦å·ä½%cå¥æ \n",temp);

express++;

break;

case '<':

//int a,b;

//char oper,result;

a=pop(&OPND)-'0';//åå¨æ ä¸çé½æ¯charåç¬¦

b=pop(&OPND)-'0';

oper=pop(&OPTR);

result=evaluate(b,a,oper);//åºæ ä¸ä¸ªæä½ç¬¦ï¼è®¡ç®ç»æ

//printf("%d",result-'0');

push(result,&OPND);//ç»æå¥OPND

printf("%d%c%dç»æä¸º:%d\n",b,oper,a,result-'0');

break;

case '=':

//æ¶é¤æ¬å·

pop(&OPTR);

printf("æ¶é¤æ¬å·\n");

express++;

break;

}

if(isValue(temp))//è¾å¥çæ¯æ°å¼

{

push(temp,&OPND);//å°æ°å¼ä½å¥æ ;

express++;

printf("å°æ°å¼%cåå¥æ \n",temp);

//show(&OPND);

}

else //è¡¨è¾¾å¼ä¸æéæ³åç¬¦

{

printf("è¡¨è¾¾å¼ä¸æéæ³åç¬¦\n");

exit(-1);//éåºç¨åº

}

// show(&OPND);

// show(&OPTR);

return getTop(&OPND)-'0';

}

void inputExpress(char *express)//è¾å¥è¡¨è¾¾å¼

{

int length=0;

printf("è¯·è¾å¥ä¸ä¸ªè¡¨è¾¾å¼:");

scanf("%s",express);

int len =strlen(express);

express[len]='#';//è¡¨è¾¾å¼æåä¸ä½é»è®¤ä¸º'#';

express[len+1]='\0';

}

void output(char *express,int result)//è¾åºè¡¨è¾¾å¼

{

int i=0;

printf("----------------------------------------\nè¡¨è¾¾å¼:");

while(express[i]!='#')

{

printf("%c",express[i]);

i++;

}

printf("=%d\n",result);

}

int main()

{

char express[];//è¡¨è¾¾å¼

int result =0;

inputExpress(express);//è¾å¥è¡¨è¾¾å¼

result = calculateExpress(express);//è®¡ç®è¡¨è¾¾å¼ï¼

output(express,result); //è¾åºè¡¨è¾¾å¼

//ãããããããããããããæµè¯ä¼åçº§ã

/**//

char m='7' ;

m=Priority('+','*');

printf("ä¼åçº§ä¸º%c",m);

int m=evaluate(5,6,'m');

printf("%d",m);

return 0;

}

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