第七篇

package com.hylcbdql.www;

public class jisuanqi {
int numa;
int numb;
int sun;
public int jia(){
return(numa+numb);
}
public int jian(){
return(numa-numb);
}
public int cheng(){
return(numa*numb);
}
public int chu(){
return(numa/numb);
}
}
package com.hylcbdql.www;

import java.util.Scanner;

public class shujijie {
public static void main(String[] args) {
jisuanqi hu =new jisuanqi();
Scanner input = new Scanner(System.in);
System.out.println(“请输入第一个数”);
hu.numa =input.nextInt();
System.out.println(“请输入第二个数”);
hu.numb =input.nextInt();
System.out.println(“请选择运算方法1.加，2.减.3.乘.4.除”);
int sun =input.nextInt();
switch(sun){
case 1:
hu.jia();
break;
case 2:
hu.jian();
break;
case 3:
hu.cheng();
break;
case 4:
hu.chu();
break;
default:
System.out.println(“输入错误！”);
}
if(sun1){
System.out.println(“结果为:”+hu.jia());
}else if(sun2){
System.out.println(“结果为:”+hu.jian());
}else if(sun==3){
System.out.println(“结果为:”+hu.cheng());
}else if(sun>3||sun<=4){
System.out.println(“结果为:”+hu.chu());
}else{
System.out.println(“”);
}
}
}