简易计算机的制作

import java.util.Scanner;

public class Day03 {

public static void main(String[] args) {

Scanner scanner= new Scanner(System.in); System.out.println("输入第一个数：");

int a = scanner.nextInt(); 

System.out.println("输入算法："); System.out.println("1：乘 2：除 3：加 4:减");

int z = scanner.nextInt();

System.out.println("输入第二个数:");

int b = scanner.nextInt();

while ( z == 2 && b == 0)

{ System.out.println("除数不能为0，重新输入第二个数：");

b = scanner.nextInt();

}

int result = 0;

int r = 0;

switch (z){

case 1:

result = a * b;

break;

case 2:

result = a / b;

r = a % b;

break;

case 3:

result = a + b;

break;

case 4:

result = a - b;

break;

default: break;

}

if (r>0){

System.out.println("结果为："+result+",余数为："+r);

}else{ System.out.println("结果为："+result);

}

scanner.close();

}

}