CODEWITHSUNDEEP
c#
StackImStuck
StackImStuck

Reputation: 11

Do while work in C++ but not in C# and i don't know why

my do while function doesn't work in C# and i can't figure it out why, so here is the code :

I'm new to the community, the same code works well when is written is C++ 😔

Thanks ! enter image description here

    using System;






namespace MiniCalculator
{
    internal class Program
    {
        static void Main(string[] args)
        {
            double nb, nb1, result;
            string ope, go;
            

            do
            {

                Console.WriteLine("What do you want to do ? Choose the operator between these propositions : + - * / ");
                ope = Console.ReadLine();

                if (ope != "+" && ope != "-" && ope != "*" && ope != "/")
                {
                    while (ope != "+" && ope != "-" && ope != "*" && ope != "/")
                    {
                        Console.WriteLine("Please, choose a right operator");
                        ope = Console.ReadLine();
                    }
                }
                else

                Console.WriteLine("Operator choosen : ", ope);
                Console.WriteLine("First number please.");
                nb = Convert.ToInt32(Console.ReadLine());
                Console.WriteLine("Second number please.");
                nb1 = Convert.ToInt32(Console.ReadLine());

                if (ope == "+")
                {
                    result = nb + nb1;
                    Console.WriteLine("Here is the result : " + result);
                }
                else if (ope == "-")
                {
                    result = nb - nb1;
                    Console.WriteLine("Here is the result : " + result);
                }
                else if (ope == "*")
                {
                    result = nb * nb1;
                    Console.WriteLine("Here is the result : " + result);
                }
                else if (ope == "/")
                {
                    result = nb / nb1;
                    Console.WriteLine("Here is the result : " + result);
                }

                Console.WriteLine("Do you want to do another calculation ? (Y/n)");
                go = Console.ReadLine();

                if (go != "y" || go != "Y")
                {
                    Environment.Exit(0);
                }

            } while (go == "y" || go == "Y");
            

        }
    }
}

Upvotes: 0

Views: 85

Answers (3)

MD. RAKIB HASAN
MD. RAKIB HASAN

Reputation: 3956

if (go != "y" || go != "Y")
 {
    Environment.Exit(0);
 }

this condition always exit your program..
try this:

if (go == "x" || go == "X")
{
     Environment.Exit(0);
}

Upvotes: 0

Eboy
Eboy

Reputation: 71

Remove this code

if (go != "y" || go != "Y")
 {
    Environment.Exit(0);
 }

This means that if go was y end the do while loop and exit the app.

Upvotes: 0

pm100
pm100

Reputation: 50190

You code summarizes to

 do{

......

} while (go == "y" && go == "Y");

So this continues running when go == "y" and == "Y"

That can never happen, so it runs once

I think you mean

 while (go == "y" || go == "Y");

You seem to think there is something magic going on here

look at this code

        if (go != "y" || go != "Y")
        {
            Environment.Exit(0);
        }

We should consider 3 possibilities for go values

go = "X"
go = "Y"
go = "y"

which one of these will make your program exit

well with "X"

     if (go != "y" || go != "Y")
     ------true      ----true

So exit

with "Y"

     if (go != "y" || go != "Y")
     -------true     ---false

so exit

with "y"

      if (go != "y" || go != "Y")
      -------false     ----true

so exit

There is no combination that does not exit.

You had the same problem with your while but inverted, it was always false

and I 100% guarantee that this is the same in c++

Upvotes: 3

Related Questions