import java.awt.*;
import java.awt.event.*;
import javax.swing.ImageIcon;
class Ks2 extends Frame implements ActionListener
{
 Label  lab1,lab2,lab3,lab4,lab5;
 Button but1,but2;
 public Ks2 ()
 {
  super("             随       机      出       题");
  addWindowListener(new WindowAdapter()
  {public void windowClosing(WindowEvent e)
  {System.exit(0);}});
        initialize();
 }
 public void initialize()
 {
  setSize(300,200);
        this.setLayout(null);
        lab1=new Label("");
  lab1.setAlignment(Label.CENTER);
  lab1.setBounds(20,60,30,25);
  lab1.setBackground(Color.blue);
  lab1.setForeground(Color.red);
        add(lab1);
        lab2=new Label("");
  lab2.setAlignment(Label.CENTER);
  lab2.setBounds(75,60,30,25);
  lab2.setBackground(Color.blue);
  lab2.setForeground(Color.red);
        add(lab2);
        lab3=new Label("");
        lab3.setAlignment(Label.CENTER);
        lab3.setBounds(130,60,30,25);
        lab3.setBackground(Color.blue);
        lab3.setForeground(Color.red);
        add(lab3);
        lab4=new Label("〓");
  lab4.setAlignment(Label.CENTER);
  lab4.setBounds(185,60,30,25);
  lab4.setBackground(Color.blue);
  lab4.setForeground(Color.red);
        add(lab4);
        lab5=new Label("");
  lab5.setAlignment(Label.CENTER);
  lab5.setBounds(240,60,30,25);
  lab5.setBackground(Color.blue);
  lab5.setForeground(Color.red);
        add(lab5);
        but1=new Button("出 题");
  but1.setBounds(60,130,50,25);
  but1.addActionListener(this);
        add(but1);
        but2=new Button("评 分");
     but2.setBounds(170,130,50,25);
  but2.addActionListener(this);
        add(but2);
        setVisible(true);
 }
 public void actionPerformed(ActionEvent e)
 {
  if(e.getSource()==but1)
  {
   int a=(int)(4*Math.random()+1);
      switch(a)
      {
       case 1:
        lab2.setText("╋");break;
       case 2:
        lab2.setText("━");break;
       case 3:
        lab2.setText("★");break;
       case 4:
        lab2.setText("/");break;
      }
      lab1.setText(String.valueOf((int)(99*Math.random()+1)));

               lab3.setText(String.valueOf((int)(99*Math.random()+1)));
  }
  if(e.getSource()==but2)
    {
     int result=0;
     String s;
     s=lab2.getText();
     if(s.equals("╋")) result=Integer.parseInt(lab1.getText())+Integer.parseInt(lab3.getText());
     if(s.equals("━")) result=Integer.parseInt(lab1.getText())-Integer.parseInt(lab3.getText());
     if(s.equals("★")) result=Integer.parseInt(lab1.getText())*Integer.parseInt(lab3.getText());
     if(s.equals("/")) result=Integer.parseInt(lab1.getText())/Integer.parseInt(lab3.getText());
     //if(result==Integer.parseInt(tf.getText()));
   /*  JOptionPane.showInputDialog("回答正确");
     else
     JOptionPane.showInputDialog("不正确")  */
  }
 }
 public static void main(String args[])
 {
  new Ks2();
 }

}

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