计算器

package struct;

import java.util.Scanner;

public class Demo04 {
    public static void main(String[] args) {
        System.out.println("请输入两个数");
        Scanner a = new Scanner(System.in);
        int num1 = a.nextInt();
        Scanner b = new Scanner(System.in);
        int num2 = b.nextInt();
        Scanner sc = new Scanner(System.in);
        System.out.println("请输入运算符");
        String s = sc.nextLine();
        switch (s){
            case "+":
                int sum = sum(num1, num2);
                System.out.println("两者的和为："+sum);
                break;
            case "-":
                int jian = jian(num1, num2);
                System.out.println("两者的差为："+jian);
                break;
            case "*":
                int cheng = cheng(num1, num2);
                System.out.println("两者的成为："+cheng);
                break;
            case "/":
                int chu = chu(num1, num2);
                System.out.println("两者的除为："+chu);
                break;
            default:
                System.out.println("输出错误");
        }
        a.close();
        b.close();
        sc.close();

    }
    public static int sum (int num1,int num2){
        int result = 0;
        result = num1+num2;
        return result;
    }

    public static int jian (int num1,int num2){
        int result = 0;
        result = num1-num2;
        return result;
    }

    public static int cheng (int num1,int num2){
        int result = 0;
        result = num1*num2;
        return result;
    }

    public static int chu (int num1,int num2){
        int result = 0;
        result = num1/num2;
        return result;
    }
}