_kbhit
Checks the console for keyboard input.
Important
This API cannot be used in applications that execute in the Windows Runtime. For more information, see CRT functions not supported with /ZW.
int _kbhit( void );
Return Value
_kbhit returns a nonzero value if a key has been pressed. Otherwise, it returns 0.
Remarks
The _kbhit function checks the console for a recent keystroke. If the function returns a nonzero value, a keystroke is waiting in the buffer. The program can then call _getch or _getche to get the keystroke.
Requirements
Routine |
Required header |
|---|---|
_kbhit |
<conio.h> |
For more compatibility information, see Compatibility in the Introduction.
Libraries
All versions of the C run-time libraries.
Example
// crt_kbhit.c
// compile with: /c
/* This program loops until the user
* presses a key. If _kbhit returns nonzero, a
* keystroke is waiting in the buffer. The program
* can call _getch or _getche to get the keystroke.
*/
#include <conio.h>
#include <stdio.h>
int main( void )
{
/* Display message until key is pressed. */
while( !_kbhit() )
_cputs( "Hit me!! " );
/* Use _getch to throw key away. */
printf( "\nKey struck was '%c'\n", _getch() );
}
Sample Output
Hit me!! Hit me!! Hit me!! Hit me!! Hit me!! Hit me!! Hit me!!
Key struck was 'q'