A problem with Console.Write(@"")......Please help

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Hi,I'm a beginner in C#.I wanted to create a basic program in which we add numbers repeatedly.I was successful but I also wanted to make it more simple by not displaying the line "The current answer is xxx" every time I enter a number.I wanted the text to stay in just one place and only the number to change when we have a new answer.That's why I wrote the line Console.Write(@"") but it doesn't seem to work.Please tell me if I'm doing something wrong and please tell me the correct code.

C#

namespace Tutorial1
{
    class Program
    {
        static void Main(string[] args)
        {
            int answer, current;
            string currenttranslated;

            answer = 0;
            do
            {
                currenttranslated = Console.ReadLine();
                current = int.Parse(currenttranslated);
                answer = current + answer;
                    Console.Write(@"The current answer is {0}",answer);
                Console.WriteLine();
            }
            while (0 == 0);

        }
    }
}

Posted 11-Jul-14 22:45pm

swapnil999

Updated 11-Jul-14 22:56pm

Richard MacCutchan

v2

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Rob Philpott · Accepted Answer · 2014-07-11T22:53:00

This can actually get quite complicated. Generally when you use Console.Write(Line) you are outputting to the process' standard output stream - something which has been around on every platform since the dawn of time. So as such, what you want isn't generally a good idea.

For instance, you can redirect input and output from you application to files to work in a batch manner without user interaction.

The Console class does contain quite a bit of stuff for manipulation of text within a console window though. Probably the easiest way to do this would be to issue a Console.Clear() in your loop so that the window starts afresh each time.

Otherwise, you can get involved with determining the window size, then positioning the cursor prior to writing but then you get into the world of blanking stuff out etc.

Have a look at the class reference for Console if you need more info.

johannesnestler · Accepted Answer · 2014-07-11T23:30:00

Hi swapnil999

You can try to clear the console before Input like this:

C#

class Program
 {
     static void Main(string[] args)
     {
         int answer, current;
         string currenttranslated;

         answer = 0;
         do
         {
             Console.Write("Enter new number: ");
             currenttranslated = Console.ReadLine();
             Console.Clear();
             current = int.Parse(currenttranslated);
             answer = current + answer;
             Console.Write(@"The current answer is {0}", answer);
             Console.WriteLine();
         }
         while (true);
     }
 }

Also think about a possibillity to exit the program (no endless loop), maybe if a non valid number is entered? You could check with int.TryParse and exit the loop
happy coding

Johannes

OriginalGriff · Accepted Answer · 2014-07-11T22:49:00

It's not that simple, I'm afraid!
The console is pretty basic - it emulates a very old device called a teletype where a roll of paper was printed on, so you can't "go back" to the previous line and erase the old info and write new!

Fortunately, you can do it with the Console - but not via Write.
You need to use Console.SetCursorPosition[^] instead, then write.

A problem with Console.Write(@"")......Please help

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