Java简易四则运算

简易四则运算

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• 如果数字范围不够或者有小数就改成float或double类型

  public static class MyMath
    {
    //加法功能
    public static int add(int a, int b) {
        return a + b;
    }

    //减法功能
    public static int sub(int a, int b) {
        return a - b;
    }
    //乘法功能
    public static int mul(int a, int b) {
        return a * b;
    }

    //除法功能
    public static int div(int a, int b) {
        return a / b;
    }

}
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in); //输入流
        System.out.println("请输入第一个操作数：");
        int firstNumber = sc.nextInt();
        System.out.println("请输入第二个操作数：");
        int secondNumber = sc.nextInt();
        //创建MyMath对象，并使用
        MyMath mm = new MyMath();
        System.out.println("加法结果："+mm.add(firstNumber,secondNumber));
        System.out.println("减法结果："+mm.sub(firstNumber,secondNumber));
        System.out.println("乘法结果："+mm.mul(firstNumber,secondNumber));
        System.out.println("除法结果："+mm.div(firstNumber,secondNumber));
    }