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c:graphics.h:getmaxx

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c:graphics.h:getmaxx [2015/05/06 23:06] (current)
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 +===== getmaxx =====
 +
 +
 +====Syntax of getmaxx ==== 
 + <code c>
 +#include <graphics.h>
 +int getmaxx(void);
 +  </code>
 +
 +
 +==== Description of getmaxx ==== 
 +<code c>
 +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.
 +</code>
 +
 +
 +==== Example of getmaxx ====
 +<code c>
 +/* 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;
 +}
 +</code>
 +
 +
 +==== See also ====
 +[[getmaxy]]
 +[[getwindowwidth]]
 +[[getx]]
 +
 +
 +===== output of getmaxx example ===== 
 +
 +    no output of example at the moment
 +    do not hesitate and add it...  
 +
 +
  
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c/graphics.h/getmaxx.txt · Last modified: 2015/05/06 23:06 (external edit)

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