using System.Globalization;

namespace MathOperations
{
    class Program
    {
        static void Main(string[] args)
        {
            bool use_again = true;
            Console.WriteLine("Welcome to my own calculator program");
            while (use_again == true)
            {
                Console.WriteLine();
                Console.WriteLine("Please input the first number : ");
                double number1 = Convert.ToDouble(Console.ReadLine());
                Console.WriteLine("Please input the second number : ");
                double number2 = Convert.ToDouble(Console.ReadLine());
                Console.WriteLine();
                Console.WriteLine("Please input an option");
                Console.WriteLine("Add :  ");
                Console.WriteLine("Substract : -");
                Console.WriteLine("Multiply : *");
                Console.WriteLine("Devide : /");
                char operation_symb = Convert.ToChar(Console.ReadLine());
                double result = 0;

                switch (operation_symb)
                {
                    case ' ':
                        result = Math.add(number1, number2);

                        break;
                    case '-':
                        result = Math.Substract(number1, number2);

                        break;
                    case '*':
                        result = Math.Multiply(number1, number2);

                        break;

                    case '/':
                        while (number2 == 0)
                        {
                            Console.WriteLine("You can't devide by zero idiot");
                            Console.WriteLine("Please input a valid option");
                            number2 = Convert.ToDouble(Console.ReadLine());
                            if (number2 == 0)
                            {
                                continue;
                            }
                            result = Math.Devide(number1, number2);
                        }
                        break;
                    default:
                        Console.WriteLine("That's not a valid option");
                        break;

                }

                Console.WriteLine($"The result is {number1} {operation_symb} {number2} = {result.ToString("F10", CultureInfo.CurrentCulture)}");
                Console.WriteLine("Would you like to use the calculator again?(Y/N)");
                string answer;
                answer = Console.ReadLine().ToUpper();
                answer = "";
                switch (answer)
                {
                    case "Y":
                        use_again = true;
                        break;
                    case "N":
                        use_again = false;
                        Console.WriteLine("Thanks for using me");
                        Environment.Exit(0);
                        break;
                    default:

                        Console.WriteLine("That's not a vailid opetion");
                        answer = Console.ReadLine().ToUpper();

                        if (answer == "Y")
                        {
                            use_again = true;

                        }
                        else if (answer == "N")
                        {
                            use_again = false;

                        }
                        break;
                }

            }


        }


    }

}
class Math
{
    public static double add(double number1, double number2)
    {
        return number1   number2;
    }
    public static double Substract(double number1, double number2)
    {
        return number1 - number2;
    }
    public static double Multiply(double number1, double number2)
    {
        return number1 * number2;
    }
    public static double Devide(double number1, double number2)
    {
        return number1 / number2;
    }
}

I am a beginner in C# and I have made this calculator program but when I for example devide 1 by 2 the output will be 0.0000000000. What do you think is the problem with the above code. For the other operations the decimal number work properly. Btw can you not use ChatGPT to answer this question please

CodePudding user response：

You get a output value of 0 because the while statement in the switch case return false if number2 is not 0.

Change your devide switch case with that :

case '/':
    while(number2 == 0){
       Console.WriteLine("You can't devide by zero idiot");
       Console.WriteLine("Please input a valid option");
       number2 = Convert.ToDouble(Console.ReadLine());
    }
    result = Math.Devide((double)number1, (double)number2);
break;

CodePudding user response：

Unfortunatly this was the only way to provide you with the full code