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js滑动验证源码/时,学计com = true
boolean com = false;
//当i=0时说明是算器综合授权系统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javaweb框架项目源码代号分别为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,端游免费源码 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+、-、*、/、dnf自动驱动源码=,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¨
ç¨æ å°±å¯ä»¥åå°äºãããè¿ä¸ªå¾è¯¦ç»çï¼ lz é便è¾å ¥ä¸ä¸ªè¡¨è¾¾å¼ï¼ä¸é´ç计ç®è¿ç¨å ¨é¨è¾åºäºï¼lzè¯ä¸¤ä¸ª å°±ç¥éæä¹åäºäºã #include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define MAXSIZE ;
typedef struct
{
char data[];
int top;//头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))
{
printf("æ 为空\n");
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))
{
printf("æ 为空\n");
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 满\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¦ææå符
{
if(isOperate(temp)||isValue(temp))//å¦ætempæ¢ä¸æ¯æä½ç¬¦åæ°å¼çè¯ï¼åå®æ¯éæ³ç
{
return 1;
}
return 0;
}
int detect(char temp)//æç´¢ç©éµä½ç½®
{
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¤æä¼å 级
{
/**//
*+ - * / ( ) #
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','>'},
{ '<','<','<','<','>','<','='},
};
row = detect(temp);//æ¾åºå¯¹åºçç©éµä¸æ ;
col = detect(optr);
// printf("%d,%d",row,col);
//ä¼å 级åå¨å¨ä¸ä¸ª7x7çç©éµä¸ï¼å¯¹åºå ³ç³»ä¸å¾ï¼
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)//计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("å½åç符å·ä¸º%c\n",temp);
if(isAvail(temp))//æ¯å¦æ¯ææå符
{
if(isOperate(temp) )//è¾å ¥çæ¯æä½ç¬¦
{
char oper,result;
char optr = getTop(&OPTR);//æ ä¸topä½çæä½ç¬¦
printf("æ 顶æä½ç¬¦ä½ï¼%c\n",optr);
char prior = Priority(temp,optr);//å¤æä¼å 级
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¯charå符
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»æ为:%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 //表达å¼ä¸æéæ³å符
{
printf("表达å¼ä¸æéæ³å符\n");
exit(-1);//éåºç¨åº
}
}
// show(&OPND);
// show(&OPTR);
return getTop(&OPND)-'0';
}
void inputExpress(char *express)//è¾å ¥è¡¨è¾¾å¼
{
int length=0;
printf("请è¾å ¥ä¸ä¸ªè¡¨è¾¾å¼:");
scanf("%s",express);
int len =strlen(express);
express[len]='#';//表达å¼æåä¸ä½é»è®¤ä¸º'#';
express[len+1]='\0';
}
void output(char *express,int result)//è¾åºè¡¨è¾¾å¼
{
int i=0;
printf("----------------------------------------\n表达å¼:");
while(express[i]!='#')
{
printf("%c",express[i]);
i++;
}
printf("=%d\n",result);
}
int main()
{
char express[];//表达å¼
int result =0;
inputExpress(express);//è¾å ¥è¡¨è¾¾å¼
result = calculateExpress(express);//计ç®è¡¨è¾¾å¼ï¼
output(express,result); //è¾åºè¡¨è¾¾å¼
//ãããããããããããããæµè¯ä¼å 级ã
/**//
*char m='7' ;
m=Priority('+','*');
printf("ä¼å 级为%c",m);
int m=evaluate(5,6,'m');
printf("%d",m);
*/
return 0;
}
2024-12-26 12:34
2024-12-26 12:26
2024-12-26 11:42
2024-12-26 11:37
2024-12-26 10:18