C语言中的grapherrormsg（）函数-yiteyi-C++库

头文件显示图形。h包含 grapherrormsg（） 返回错误消息字符串的函数。 语法：

null

char *grapherrormsg( int errorcode );
where,
errorcode: code for the respective error

图示如箭头所示： 在下面的程序中，gd=DETECT未被写入，因此程序必须抛出一个错误。

下面是C语言中grapherrormsg（）函数的实现

                     // C Implementation for grapherrormsg()                   
                     #include <graphics.h>                   
                     #include <stdio.h>                   
                             
                     //driver code                   
                     int                               main()                   
                     {                   
                                         // gm is Graphics mode which is                   
                                         // a computer display mode that                   
                                         // generates image using pixels.                   
                                         // DETECT is a macro defined in                   
                                         // "graphics.h" header file                   
                                         int                               gd, gm, errorcode;                   
                             
                                         // initgraph initializes the                   
                                         // graphics system by loading a                   
                                         // graphics driver from disk                   
                                         initgraph(&gd, &gm,                               ""                               );                   
                             
                                         // graphresult returns the error code                   
                                         // for the last graphics operation                   
                                         // that reported an error and resets                   
                                         // the error level to grOk.                   
                                         errorcode = graphresult();                   
                             
                                         if                               ( errorcode != grOk)                   
                                         {                   
                                         printf                               (                               "Graphics error: %s"                               ,                   
                                         grapherrormsg(errorcode));                   
                             
                                         printf                               (                               "Press any key to exit."                               );                   
                                         getch();                   
                                         exit                               (1);                   
                                         }                   
                             
                                         getch();                   
                             
                                         // closegraph function closes the                   
                                         // graphics mode and deallocates                   
                                         // all memory allocated by                   
                                         // graphics system .                   
                                         closegraph();                   
                             
                                         return                               0;                   
                     }                   

输出：

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