using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleCalculator
{
    public class Calculator
    {
        static void Main(string[] args)
        {
            int firstNumber;
            int secondNumber;

            Console.WriteLine("Hi, write a first number and press Enter");
            firstNumber = int.Parse(Console.ReadLine());

            Console.WriteLine("ok, write a second number and press Enter");
            secondNumber = int.Parse(Console.ReadLine());

            Console.WriteLine("What do you want to do with these numbers?");
            Console.WriteLine("write + to add");
            Console.WriteLine("write - to substract ");
            Console.WriteLine("write * multiply");
            Console.WriteLine("write / divide");

            switch (Console.ReadLine())
            {
                case "+":
                    Add(firstNumber, secondNumber);
                    break;
                case "-":
                    Substract(firstNumber, secondNumber);
                    break;
                case "*":
                    Multiply(firstNumber, secondNumber);
                    break;
                case "/:
                    Dvide(firstNumber, secondNumber);
                    break;
            }
        }

        public int Add(int a, int b)
        {
            int score = 0;
            score = a + b;
            return Console.WriteLine(score);
        }

        public int Substract(int a, int b)
        {
            int score = 0;
            score = a - b;
            return score;
        }

        public int Multiply(int a, int b)
        {
            int score = 0;
            score = a * b;
            return score;
        }

        public double Divide(int a, int b)
        {
            int score = 0;
            score = a / b;
            return score;
        }
    }
}