C Program for Midpoint Line Drawing Algorithm - Working

# include <iostream.h>
# include <conio.h>
# include <graphics.h>
# include <math.h>
void Circle(int Radius,int xC,int yC);
main()
{
 int gDriver=DETECT, gMode;
 initgraph(&gDriver,&gMode,"c:\\tc\\bgi");

 int Radius, xC, yC;
 cout<< endl << "Enter Center point coordinates...";
 cout<<endl<<"  Xc    : ";
 cin>>xC;
 cout<<endl<<"  Yc    : ";
 cin>>yC;
 cout<<endl<<"Radius  : ";
 cin>>Radius;
 cleardevice();
 Circle(Radius,xC,yC);
 getch();
 return 0;
}
void Circle(int Radius,int xC,int yC)
{
 int P;
 int x,y;
 void Draw(int x,int y,int xC,int yC);
 P = 1 - Radius;
 x = 0;
 y = Radius;
 Draw(x,y,xC,yC);
 while (x<=y)
 {
  x++;
  if (P<0)
  {
   P += 2 * x + 1;
  }
  else
  {
   P += 2 * (x - y) + 1;
   y--;
  }
  Draw(x,y,xC,yC);
 }

}
void Draw(int x,int y,int xC,int yC)
{
 putpixel(xC + x,yC + y,12);
 putpixel(xC + x,yC - y,12);
 putpixel(xC - x,yC + y,12);
 putpixel(xC - x,yC - y,12);
 putpixel(xC + y,yC + x,12);

 putpixel(xC - y,yC + x,12);
 putpixel(xC + y,yC - x,12);
 putpixel(xC - y,yC - x,12);
}

OUTPUT: