i don't want number on output

Code:

---

if(keydown(VK_NUMPAD4))
{       
    while(keydown(VK_NUMPAD4))
        Sleep(1);       

    cout << "set scroll number: ";                       
    cin >> scroll_num;
     
    return;
}

---

When the user presses 4 to enter this section the number 4 is outputed, so the user has to press backspace before entering their input. I want it so there is nothing there.

The user sees somthing like this when pressing 4....

set scroll number: 4

when it should be...

set scroll number:

I think the best you can do is simulate the backspace key by sending the appropriate events to the application.

Just to see if I understand correctly, you want them to press the number 4 and on immediately pressing the number you don't want the number to appear on the input line?

You could always use getch:

Code:

---

char ch=getch();

if ( ch == '4' ) {
  std::cout<< "Set scroll value: ";
  std::cin >> scroll_num;
}

---

#include <conio.h> but it's not standardised, alas.

yea that works, thanks.

twomers, getch() seems quite useful, do you know any references with more information on the conio library?

First of all, you should be aware that the functions in conio.h are not very portable. conio.h was originally a Borland-specific header file that Dev-C++ implemented for some strange reason. :)

Secondly, some of the functions in Borland's original conio.h are not available in Dev-C++'s conio.h: http://www14.brinkster.com/aditsu/de...faq.html#conio

Using Windows functions as outlined in adrianxw's tutorials might be more portable than using conio.h functions: http://www.adrianxw.dk/SoftwareSite/index.html
At least with Windows functions you could compile your code with other Windows compilers like MSVC.

As for some of the functions in conio.h -- you could try the Wikipedia entry: http://en.wikipedia.org/wiki/Conio.h