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c:graphics.h:grapherrormsg

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

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