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c:graphics.h:cleardevice

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c:graphics.h:cleardevice [2015/05/06 23:06] (current)
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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...  
 +
 +
  
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c/graphics.h/cleardevice.txt · Last modified: 2015/05/06 23:06 (external edit)

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