getmaxx

Returns maximum x screen coordinate.

Defined in header <graphics.h>

Syntax

#include <graphics.h>
int far getmaxx(void);

Portability

Remarks

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

For example, on a CGA in 320x200 mode, getmaxx returns 319. getmaxx is invaluable for centering, determining the boundaries of a region onscreen, and so on.

Return value

See also

• getmaxy
• getx

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", grapherromsg(errorcode)  );
   printf ("Press any key to halt:");
   getchO  ;
   exit(l);                /* 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 */
getchO ;
closegraphO  ;
return 0;

Differences from modern implementations

Nothing recorded yet.

Modern references

• Microsoft C runtime (search)

These are search links, not yet checked by hand.

Stable link: /3.1/graphics.h/getmaxx/ · short form /3.1/getmaxx/