13-1.c

C语言程序设计及应用习题解析与上机指导 冶金工业出版社 谢乐军

Boolean InitG(void)
{ int errorcode;
 errorcode = registerbgidriver(EGAVGA_driver);
 /* report any registration errors */
 if (errorcode < 0)
 { cout<<"\a\nGraphics error: "<<grapherrormsg(errorcode);
   return false;
 }
 int gd=DETECT,gm;
 initgraph(&gd,&gm,"");
 errorcode=graphresult();
 if(errorcode!=grOk){
  cerr<<'\a'<<endl<<grapherrormsg(errorcode)<<endl;
  return false;
 }
 return true;
}