简单的计算器

package com.SC;

import java.util.Scanner;

public class operate {

/**

* 做一个简单的计算器

*/

public static void main(String[] args) {

Scanner sc = new Scanner(System.in);

double sum = 0;//初始化sum值

System.out.println("请输入第一个数:");

double num1 = sc.nextDouble();

System.out.println("请输入运算符(+,-,*,%,/):");

String operat = sc.next();

System.out.println("请输入第二个数:");

double num2 = sc.nextDouble();

if(operat.equals("+")){

sum = num1+num2;

}else if(operat.equals("-")){

sum = num1-num2;

}else if(operat.equals("*")){

sum = num1*num2;

}else if(operat.equals("%")){

sum = num1%num2;

}else if(operat.equals("/")){

sum = num1/num2;

}

System.out.println(sum);

}

}