# 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);

}

# 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);

}

**OUTPUT:**

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