c:graphics.h:kbhit
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c:graphics.h:kbhit [2015/05/06 23:06] |
c:graphics.h:kbhit [2024/02/16 01:05] (current) |
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| + | ===== kbhit ===== | ||
| + | |||
| + | |||
| + | ====Syntax of kbhit ==== | ||
| + | <code c> | ||
| + | #include "graphics.h" | ||
| + | int kbhit(void); | ||
| + | </code> | ||
| + | |||
| + | |||
| + | ==== Description of kbhit ==== | ||
| + | <code c> | ||
| + | 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). | ||
| + | </code> | ||
| + | |||
| + | |||
| + | ==== Example of kbhit ==== | ||
| + | <code c> | ||
| + | #include "graphics.h" | ||
| + | #include <stdio.h>// Provides sprintf | ||
| + | |||
| + | void outintxy(int x, int y, int value); | ||
| + | |||
| + | int main( ) | ||
| + | { | ||
| + | int i; | ||
| + | |||
| + | // Initialize the graphics window. | ||
| + | initwindow(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); | ||
| + | } | ||
| + | </code> | ||
| + | |||
| + | |||
| + | ==== See also ==== | ||
| + | [[getch]] | ||
| + | |||
| + | |||
| + | ===== output of kbhit example ===== | ||
| + | |||
| + | no output of example at the moment | ||
| + | do not hesitate and add it... | ||
| + | |||
| + | |||
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