CIRCLE MIDPOINT PROGRAM IN C

CIRCLE MIDPOINT PROGRAM IN C

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

void circlemidpoint(int xc,int yc,int rad);
void circleplotpoints(int xc, int yc, int x,int y);
//void boundaryfill(int xc,int yc,int fill,int bound);
void main()
{
   int gd=DETECT,gm,n,rad,xc,yc,fill,bound;
   initgraph(&gd,&gm,"../bgi");
   printf("Enter the center cordinates:");
   scanf("%d%d",&xc,&yc);
   printf("\n\nEnter the radius");
   scanf("%d",&rad);
   circlemidpoint(xc,yc,rad);
  // boundaryfill(xc,yc,10,5);
   getch();

}
void circlemidpoint(int xc,int yc,int rad)
{
  int x = 0,y=rad,p=1-rad;
  void circleplotpoints(int,int,int,int);
  circleplotpoints(xc,yc,x,y);
  while(x<y)
  {
    x++;
    if(p<0)
    p+=2*x+1;
    else
    {
      y--;
      p+=2*(x-y)+1;
    }
    circleplotpoints(xc,yc,x,y);
  }
}
void circleplotpoints(int xc, int yc, int x,int y)
{
  delay(100);
  putpixel(xc+x,yc+y,5);
  putpixel(xc-x,yc+y,5);
  putpixel(xc+x,yc-y,5);
  putpixel(xc-x,yc-y,5);
  putpixel(xc+y,yc+x,5);
  putpixel(xc-y,yc+x,5);
  putpixel(xc+y,yc-x,5);
  putpixel(xc-y,yc-x,5);
}
/*void boundaryfill(int xc,int yc,int fill, int bound)
{
  int cur;
  cur=getpixel(xc,yc);
  if((cur!=bound) && (cur!=fill))
  {
    setcolor(fill);
    putpixel(xc,yc,fill);
    delay(10);
    boundaryfill(xc+1,yc,fill,bound);
    boundaryfill(xc-1,yc,fill,bound);
    boundaryfill(xc,yc+1,fill,bound);
    boundaryfill(xc,yc-1,fill,bound);
  }
}  */