将所有图形设置复位为它们的缺省值

[c]代码库

#include <graphics.h> 
#include <stdlib.h> 
#include <stdio.h> 
#include <conio.h> 

int main(void) 
{ 
   /* request auto detection */ 
   int gdriver = DETECT, gmode, errorcode; 
   int maxx, maxy; 

   /* initialize graphics and local variables */ 
   initgraph(&gdriver, &gmode, "c:\\bor\\Borland\\bgi"); 

   /* read result of initialization */ 
   errorcode = graphresult(); 
   if (errorcode != grOk)  /* an error occurred */ 
   { 
      printf("Graphics error: %s\n", grapherrormsg(errorcode)); 
      printf("Press any key to halt:"); 
      getch(); 
      exit(1); /* terminate with an error code */ 
   } 

   maxx = getmaxx(); 
   maxy = getmaxy(); 

   /* output line with non-default settings */ 
   setlinestyle(DOTTED_LINE, 0, 3); 
   line(0, 0, maxx, maxy); 
   outtextxy(maxx/2, maxy/3, "Before default values are restored."); 
   getch(); 

   /* restore default values for everything */ 
   graphdefaults(); 

   /* clear the screen */ 
   cleardevice(); 

   /* output line with default settings */ 
   line(0, 0, maxx, maxy); 
   outtextxy(maxx/2, maxy/3, "After restoring default values."); 

   /* clean up */ 
   getch(); 
   closegraph(); 
   return 0; 
}