kbhit

Syntax

#include "graphics.h"
int kbhit(void);

Description

The kbhit function is available in the winbgim implementation of BGI graphics. You do not need to include conio.h; just include graphics.h. The function returns true (non-zero) if there is a character in the input buffer ready to read. Otherwise it returns false. In order to work, the user must click in the graphics window (i.e., the Windows focus must be in the graphics window).

Return Value

True (non-zero) if there is a character in the input buffer, otherwise false.

See also

getch

Example

#include "graphics.h"
#include <stdio.h>      // Provides sprintf

void outintxy(int x, int y, int value);

int main( )
{
    int i;

    // Initialize the graphics window.
    init_window(400, 300);

    // Convert some numbers to strings and draw them in graphics window:
    outtextxy(20, 130, "Click in this graphics window,");
    outtextxy(20, 140, "and then press a key to stop.");
    outtextxy(10, 10, "Here are some numbers:");
    for (i = 0; !kbhit( ); i++)
    {
        outintxy(20 + (i/10)*40 , (i % 10)*+10, i);
        delay(4000);
    }

    closegraph( );
}

void outintxy(int x, int y, int value)
{
   char digit_string[20];
   sprintf(digit_string, "%d", value);
   outtextxy(x, y, digit_string);
}