C中的grapherrormsg()函数

头文件graphics.h包含grapherrormsg()函数，该函数返回错误消息字符串。
句法 ：

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

grapherrormsg()的插图：在下面的程序中，未编写gd = DETECT，因此程序必须抛出错误。

下面是C中grapherrormsg()函数的实现

// C Implementation for grapherrormsg()
#include 
#include 
  
//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\n", 
             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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