我正在尝试在 C# 控制台中构建一个简单的计算器

Question

using System;

namespace Calculator
{
    class Program
    {
        static void Main(string[] args)
        {
            int num1, num2;
            Console.WriteLine("Enter a operation: Add, Subtract, Multiply, divide");
            Console.ReadLine();

            Console.WriteLine("Enter a number");
            num1 = int.Parse(Console.ReadLine());

            Console.WriteLine("Enter another number");
            num2 = int.Parse(Console.ReadLine());
        }

        static int Operations(int add, int subtract, int multiply, int divide, int operation, int answer, int num1, int num2)
        {
            if (operation == add)
            {
                add = num1 + num2;
                answer = add;
                Console.WriteLine(answer);
                return answer;
            }

            else if (operation == subtract)
            {
                subtract = num1 - num2;
                answer = subtract;
                Console.WriteLine(answer);
                return answer;
            }

            else if (operation == multiply)
            {
                multiply = num1 * num2;
                answer = subtract;
                Console.WriteLine(answer);
                return answer;
            }

            else if (operation == divide)
            {
                if (num2 == 0)
                {
                    Console.WriteLine("Cannot Compute");
                }

            }
            else
            {
                divide = num1 / num2;
                answer = divide;
                Console.WriteLine(answer);
                return answer;
            }
            return answer;
        }
    }
}

嗨，我是 C# 的新手，我大约在一年半前开始使用它，此后就再也没有碰过它。 一周前我又回到了它，我想做一个计算器作为我的第一个“主要项目”，但我似乎无法让它正常工作。 我期待它在用户可以输入操作并输入 2 个数字以进行加、减、乘或除的地方，但我似乎无法让控制台打印出任何问题的答案。 我在你可以输入你想要的操作和 2 个数字的地方做了它。 但它并没有打印出计算的答案。 我该怎么做才能让它发挥作用？

Answer 1

using System;

namespace Calculator
{
 class Program
 {
    static int num1, num2;
    static string operation;
    static int add;
    static int answer;
    static int subtract;
    static int multiply;
    static int divide;

    static void Main(string[] args)
    {
        Program program = new Program();

        Console.WriteLine("Enter a operation: Add, Subtract, Multiply, divide");
        operation = Console.ReadLine();

        Console.WriteLine("Enter a number");
        num1 = int.Parse(Console.ReadLine());

        Console.WriteLine("Enter another number");
        num2 = int.Parse(Console.ReadLine());

        program.Operations();
        Console.ReadKey();
    }

    public void Operations()
    {
        if (operation == "add")
        {
            add = num1 + num2;
            answer = add;
            Console.WriteLine("\nanswer: " + answer);
            return;
        }

        else if (operation == "subtract")
        {
            subtract = num1 - num2;
            answer = subtract;
            Console.WriteLine("\nanswer: " + answer);
            return;
        }

        else if (operation == "multiply")
        {
            multiply = num1 * num2;
            answer = subtract;
            Console.WriteLine("\nanswer: " + answer);
            return;
        }

        else if (operation == "divide")
        {
            divide = num1 / num2;
            answer = divide;
            Console.WriteLine("\nanswer: " + answer);
            return;
        }
        else
        {
            if (num2 == 0)
            {
                Console.WriteLine("Cannot Compute");
            }
        }
        return;
    }
}

}