My simple program closes automatically (New C# user)

Hi there,

I have only just started using C# and can't understand why when I open this console program it automatically closes.

Code:

---

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

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            //User entered variables
            Console.WriteLine("Enter number A");
            int a = Convert.ToInt32(Console.ReadLine());
            Console.WriteLine("Enter number B");
            int b = Convert.ToInt32(Console.ReadLine());
            Console.WriteLine("Enter number C");
            int c = Convert.ToInt32(Console.ReadLine());

            //Calculation
            int d = a * b;

            //Result
            Console.WriteLine(a + "x" + b + "x" + c + "=" + d);
            Console.WriteLine("Press enter to quit");
            Console.ReadLine();

        }
    }
}

---

No errors were reported by Visual 2010 Express.

Thanks.

Console.WriteLine("Press anykey to quit");
Console.ReadKey(true);

Quote:

---

Originally Posted by Erendar

Console.WriteLine("Press anykey to quit");
Console.ReadKey(true);

---

Thanks but I've just tried that and it still closes on me. Any ideas?

Do you get to see any output? What if you run it with the "Start Without Debugging" command, from the Debug menu (or Ctrl+F5)? When run from VS with Ctrl+F5, it should automatically display "Press any key to continue..." before it exists, so maybe you'll get a chance to see what's going on. If a runtime exception occurred, a console app will print the error message right there in the window - it is possible that an exception was thrown, but that the window closed before you got a chance to see it.

You can also put a breakpoint (click on the grey area on the left side, a big red dot will appear) on the first line of code inside Main(), and then start debugging with F5; this way, you'll be able to step through the code line-by-line (F10, or Debug menu, Step Over), and follow the execution of your application (just make sure you have both VS and your app visible at the same time).

If any of this works, if you see an exception or something, post here.

Curious...
Line 21 did you mean to put:

Code:

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int d = a * b * c;

---

That's not causing your problem but just would make sense for what you put in Console.WriteLine
I'd also change line 26 to Console.ReadKey();

Besides that, this should not be closing automatically.

Program runs just fine. There is something else going on. What version of visual Studio do you have? (Which .net framework are you on?)

He's on VS 2010 Express.

Is this all code you have benewen? Isn't there any other subs or codes ?

That's all the code there is.

try this ..

Code:

---

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

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            try
            {
                Console.WriteLine("Enter number A");
                int a = Convert.ToInt32(Console.ReadLine());
                Console.WriteLine("Enter number B");
                int b = Convert.ToInt32(Console.ReadLine());
                Console.WriteLine("Enter number C");
                int c = Convert.ToInt32(Console.ReadLine());
                try
                {
                    //Calculation
                    //Result
                    int d = a * b;
                    Console.WriteLine(String.Format("{0}x{1}x{2}={3}", a, b, c, d));
                    Console.WriteLine("Press enter to quit");
                    Console.ReadLine();
                }
                catch (Exception e)
                {
                    Console.WriteLine(e.Message);
                    Console.ReadLine();
                }

               
            }
            catch (Exception e)
            {
                Console.WriteLine(e.Message);
                Console.ReadLine();
           
            }
        }
    }
}

---

Hi..
I tried your code.. Its working properly... its not cloasing until i click enter..
May i Know what's ur exact problem??????

Quote:

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Originally Posted by HTCc

Hi..
I tried your code.. Its working properly... its not cloasing until i click enter..
May i Know what's ur exact problem??????

---

That is because

Code:

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Console.ReadLine();

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Waits for user input, ie. Enter