函数名: grapherrormsg

功 能: 返回一个错误信息串的指针

用 法: char *far grapherrormsg(int errorcode);

程序例:

#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 a */

/* descriptive error message. */

if (errorcode != grOk)

{

printf("Graphics error: %s\", 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;

}