c:graphics.h:cleardevice
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| + | ===== cleardevice ===== | ||
| + | |||
| + | |||
| + | ====Syntax of cleardevice ==== | ||
| + | <code c> | ||
| + | #include <graphics.h> | ||
| + | void cleardevice(void); | ||
| + | </code> | ||
| + | |||
| + | |||
| + | ==== Description of cleardevice ==== | ||
| + | <code c> | ||
| + | cleardevice erases (that is, fills with the current background color) the | ||
| + | entire graphics screen and moves the CP (current position) to home (0,0). | ||
| + | </code> | ||
| + | |||
| + | |||
| + | ==== Example of cleardevice ==== | ||
| + | <code c> | ||
| + | /* cleardevice example */ | ||
| + | |||
| + | #include <graphics.h> | ||
| + | #include <stdlib.h> | ||
| + | #include <stdio.h> | ||
| + | #include <conio.h> | ||
| + | |||
| + | int main(void) | ||
| + | { | ||
| + | /* request autodetection */ | ||
| + | int gdriver = DETECT, gmode, errorcode; | ||
| + | int midx, midy; | ||
| + | |||
| + | /* initialize graphics and local variables */ | ||
| + | initgraph(&gdriver, &gmode, ""); | ||
| + | |||
| + | /* read result of initialization */ | ||
| + | errorcode = graphresult(); | ||
| + | if (errorcode != grOk) { /* an error occurred */ | ||
| + | printf("Graphics error: %s\n", grapherrormsg(errorcode)); | ||
| + | |||
| + | printf("Press any key to halt:"); | ||
| + | getch(); | ||
| + | exit(1); /* terminate with an error code */ | ||
| + | } | ||
| + | |||
| + | midx = getmaxx() / 2; | ||
| + | midy = getmaxy() / 2; | ||
| + | setcolor(getmaxcolor()); | ||
| + | |||
| + | /* for centering screen messages */ | ||
| + | settextjustify(CENTER_TEXT, CENTER_TEXT); | ||
| + | |||
| + | /* output a message to the screen */ | ||
| + | outtextxy(midx, midy, "Press any key to clear the screen:"); | ||
| + | |||
| + | getch(); /* wait for a key */ | ||
| + | cleardevice(); /* clear the screen */ | ||
| + | |||
| + | /* output another message */ | ||
| + | outtextxy(midx, midy, "Press any key to quit:"); | ||
| + | /* clean up */ | ||
| + | getch(); | ||
| + | closegraph(); | ||
| + | return 0; | ||
| + | } | ||
| + | </code> | ||
| + | |||
| + | |||
| + | ==== See also ==== | ||
| + | [[clearviewport]] | ||
| + | |||
| + | |||
| + | ===== output of cleardevice example ===== | ||
| + | |||
| + | no output of example at the moment | ||
| + | do not hesitate and add it... | ||
| + | |||
| + | |||
on the occasion of the current invasion of Russia in Ukraine
c/graphics.h/cleardevice.txt · Last modified: 2024/02/16 01:05 (external edit)
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