getmaxx

Syntax

#include <graphics.h>

int getmaxx(void);

Description

getmaxx returns the maximum (screen-relative) x value for the current graphics driver and mode.

For example, on a CGA in 320*200 mode, getmaxx returns 319. getmaxx is invaluable for centering, determining the boundaries of a region onscreen, and so on.

Return Value

getmaxx returns the maximum x screen coordinate.

See also

getmaxy

getwindowwidth

getx

Example

/* getmaxx 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;

   char xrange[80], yrange[80];





   /* 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;



   /* convert max resolution values to strings */

   sprintf(xrange, "X values range from 0..%d", getmaxx());

   sprintf(yrange, "Y values range from 0..%d", getmaxy());



   /* display the information */

   settextjustify(CENTER_TEXT, CENTER_TEXT);

   outtextxy(midx, midy, xrange);

   outtextxy(midx, midy + textheight("W"), yrange);





   /* clean up */

   getch();

   closegraph();

   return 0;

}