How do i check to see if a key is being pressed?

How do i check to see if a key is being pressed while in a "while()" loop?

If you're in a Windows app - your window will receive a WM_CHAR message.

For console apps, try the getch() function. Unfortunately I think that doesn't return until a key is pressed...

Use the _getch function.

Code:

---

#include <conio.h>
#include <ctype.h>

void main()
{
  char ch;

  _cputs( "Enter a letter: " );
  // Loop until "Y" is pressed
  do
  {
      ch = _getch();
      ch = toupper( ch );
  }
  while( ch != 'Y');
}

---