c:graphics.h:grapherrormsg
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c:graphics.h:grapherrormsg [2015/05/06 23:06] |
c:graphics.h:grapherrormsg [2024/02/16 01:05] (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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