grapherrormsg

Syntax

#include <graphics.h>
char * grapherrormsg(int errorcode);

Description

grapherrormsg returns a pointer to the error message string associated with errorcode, the value returned by graphresult.

Refer to the entry for errno in the Library Reference, Chapter 4, for a list of error messages and mnemonics.

Return Value

grapherrormsg returns a pointer to an error message string.

See also

graphresult

Example

/* grapherrormsg example */ 

#include <graphics.h>
#include <stdlib.h>
#include <stdio.h>
#include <conio.h>

#define NONSENSE -50

int main(void)
{
   /* force an error to occur */
   int gdriver = NONSENSE, gmode, errorcode;

   /* initialize graphics mode */
   initgraph(&gdriver, &gmode, "");

   /* read result of initialization */
   errorcode = graphresult();

   /* if an error occurred, then output descriptive error message*/
   if (errorcode != grOk) {
      printf("Graphics error: %s\n", grapherrormsg(errorcode));

      printf("Press any key to halt:");
      getch();
      exit(1);               /* terminate with an error code */
   }


   /* draw a line */
   line(0, 0, getmaxx(), getmaxy());

   /* clean up */
   getch();
   closegraph();
   return 0;
}