Java实现四则运算（二）

package random;
import java.util.*;
import java.math.*;
public class Com {

    public static void main(String[] args) {
        // TODO 自动生成的方法存根
        int flag=(int)(Math.random()*100);
        ComDem name1=new ComDem();
        /*
         * resu1   +
         * resu2   -
         * resu3   *
         * resu4   /
         */
        Random choice=new Random(1);
        int choices;
        /*
         * 格式化输出 5列6行
         * 定义 line  row 
         */
        int line=0;
        Random rand1 =new Random(8);
        Random rand2 =new Random(10);
        name1.num1=rand1.nextInt(101);
        name1.num2=rand2.nextInt(101);
        int resu1,resu2,resu3;
        double resu4;    
        for(int i=0;i<30;i++)
        {
        /*
         * 查重
         */
        while(name1.num1==name1.num2)
        {
            name1.num1=rand1.nextInt(101);
            name1.num2=rand2.nextInt(101);
        }
        choices=choice.nextInt(4);
        
        switch(choices) {
        case 0:
            System.out.print("("+(i+1)+")");
            resu1=name1.add();
            break;
        case 1:
            System.out.print("("+(i+1)+")");
            resu2=name1.sub();
            break;
        case 2:
            System.out.print("("+(i+1)+")");
            resu3=name1.mix();
            break;
        case 3:
            System.out.print("("+(i+1)+")");
            resu4=name1.chu();
            
            break;
        }
        line++;
        if(line!=0&&line%5==0)
        {
            System.out.println();
        }
        name1.num1=rand1.nextInt(101);
        name1.num2=rand2.nextInt(101);
        }
    }
}

package random;
import java.util.*;
import java.math.*;
public class ComDem {
    public int  num1;
    public int num2;
    public double getNum1() {
        return num1;
    }
    public void setNum1(int num1) {
        this.num1 = num1;
    }
    public double getNum2() {
        return num2;
    }
    public void setNum2(int num2) {
        this.num2 = num2;
    }
    public int getR1() {
        num1=(int)(Math.random()*100);
        return num1;
    }
    public int getR2() {
        num2=(int)(Math.random()*100);
        return num2;
    }
    public int add() {
        System.out.print(num1+"+"+num2+"="+"\t");
        return num1+num2;
    }
    public int sub() {
        System.out.print(num1+"-"+num2+"="+"\t");
        return num1-num2;
    }
    public int mix() {
        System.out.print(num1+"*"+num2+"="+"\t");
        return num1*num2;
    }
    public double chu() {
        System.out.print(num1+"/"+num2+"="+"\t");
        return (double)(num1/num2);
    }
    public ComDem(int num1, int num2){
        this.num1 = num1;
        this.num2 = num2;
    }
    ComDem(){};
    
    
}