Sunrise

#include<stdio.h>
#include<graphics.h>
#include<dos.h>
#include<conio.h>
#include<math.h>
#define pie 3.14

void init_graph();
void bresenham_circle(const int,const int,const int,int);

void main( )
{
 int h=320;
 int k=300;
 int r=50;
 init_graph();
 delay(1000);
 do
 {
 bresenham_circle(h,k,r,WHITE);
 floodfill(h,k-r+1,getmaxcolor());
 delay(150);
 if(k>=100)
  k -= 1;
 cleardevice();
 line(0,300,100,150);
 line(100,150,200,300);
 line(200,300,250,200);
 line(250,200,400,250);
 line(400,250,450,50);
 line(450,50,550,100);
 line(550,100,650,0);
 floodfill(50,350,getmaxcolor());

 }while(!kbhit());
 getch();
}

void init_graph()
{
 int gdriver = DETECT, gmode, errorcode;
 initgraph(&gdriver, &gmode, "");
 errorcode = graphresult();
 if (errorcode != grOk)  /* an error occurred */
 {
   printf("Graphics error: %s\n", grapherrormsg(errorcode));
   printf("Press any key to halt:");
   getch();
 }
}



void bresenham_circle(const int h,const int k,const int r,int col)
{
 int x=0;
 int y=r;
 int p=(3-(2*r));
 do
 {
  putpixel(h+x,k+y,col);
  putpixel(h+y,k+x,col);
  putpixel(h+y,k-x,col);
  putpixel(h+x,k-y,col);
  putpixel(h-x,k-y,col);
  putpixel(h-y,k-x,col);
  putpixel(h-y,k+x,col);
  putpixel(h-x,k+y,col);
  x++;
  if(p<0)
   p+=((4*x)+6);
  else
  {
   y--;
   p+=((4*(x-y))+10);
  }
 }while(x<=y);

}