C语言函数—arc

函数名

arc

功 能

画一弧线

用 法

void far arc(int x, int y, int stangle, int endangle, int radius);

程序例

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

int main(void) 
{ 
    /* request auto detection */ 
   int gdriver = DETECT, gmode, errorcode; 
   int midx, midy; 
   int stangle = 45, endangle = 135; 
   int radius = 100; 

   /* initialize graphics and local variables */ 
   initgraph(&gdriver, &gmode, ""); 

   /* read result of initialization */ 
   errorcode = graphresult();    /* an error occurred */ 
   if (errorcode != grOk) 
   { 
      printf("Graphics error: %sn", grapherrormsg(errorcode)); 
      printf("Press any key to halt:"); 
      getch(); 

      exit(1);    /* terminate with an error code */ 
   } 

   midx = getmaxx() / 2; 
   midy = getmaxy() / 2; 
   setcolor(getmaxcolor()); 

   /* draw arc */ 
   arc(midx, midy, stangle, endangle, radius); 

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

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