import java.util.*;

public class Test1 {

public static void main(String[] args) {

Scanner input = new Scanner(System.in);

System.out.print("请输入第一个操作数：");

double num1 = input.nextInt();

System.out.print("请输入第二个操作数：");

double num2 = input.nextInt();

System.out.print("运算符：");

String fuHao = input.next();

char c = fuHao.charAt(0);

double num3 = 0;

switch (c) {

case '+':

num3 = num1 + num2;

break;

case '-':

num3 = num1 - num2;

break;

case '*':

num3 = num1 * num2;

break;

case '/':

num3 = num1 / num2;

break;

default :

System.out.println("输入符号错误");

}

System.out.println(num1 + fuHao + num2 + "=" + num3);

}

}