static void Main(string[] args) { Console.WriteLine("Please fill in first number"); int firstnumber = int.Parse(Console.ReadLine()); Console.WriteLine("Please fill in operation"); char operation = char.Parse(Console.ReadLine()); Console.WriteLine("Please fill in second number"); int secondnumber = int.Parse(Console.ReadLine()); Calculations a = new Calculations(firstnumber, secondnumber); switch (operation) { case '+': int sum = a.Plus(firstnumber, secondnumber); Console.WriteLine(sum); break; case '-': int min = a.Minus(firstnumber, secondnumber); Console.WriteLine($"Answer is {min}"); break; case '*': int umn = a.Umnozhit(firstnumber, secondnumber); Console.WriteLine($"Answer is {umn}"); break; case '/': int del = a.Delit(firstnumber, secondnumber); Console.WriteLine($"Answer is {del}"); break; } }