简单计算器

仅用于两个数之间的运算。

    //简单计算器
    public static void main(String[] args) {
        while (true) {
            System.out.println("输入第一个数：");
            Scanner scanner = new Scanner(System.in);
            int a = scanner.nextInt();
            System.out.println("输入运输符号：");
            Scanner scanner1 = new Scanner(System.in);
            char symbol = scanner.next().charAt(0);
            System.out.println("输入第二个数：");
            Scanner scanner2 = new Scanner(System.in);
            int b = scanner.nextInt();
            if (symbol!='+' && symbol!='-' && symbol!='*' && symbol!='/') {
                System.out.println("无效运算符！");
            } else {
                System.out.println("结果是：" + fuhao(a, b, symbol));
            }
        }
    }

    //加法
    public static int add(int a,int b){
        return a+b;
    }
    //减法
    public static int sub(int a,int b){
        return a-b;
    }
    //乘法
    public static int mul(int a,int b){
        return a*b;
    }
    //除法
    public static int div(int a,int b){
        return a*b;
    }
    //运算符判断
    public static int fuhao(int a,int b,char ch) {
        int sum=0;
        switch (ch) {
            case '+':
                sum=add(a, b);
                break;
            case '-':
                sum =sub(a, b);
                break;
            case '*':
                sum=mul(a, b);
                break;
            case '/':
                sum=div(a, b);
                break;
        }
        return sum;
    }

标签：int,sum,计算器,System,public,static,简单,symbol
来源： https://www.cnblogs.com/qinyu33/p/16579624.html