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

int main(){

    int gd = DETECT, gm;
    int r, x, xc, yc;
    float d;

    initgraph(&gd, &gm, "");
    printf("Enter the radius: ");
    scanf("%d", &r);

    printf("Enter the center of the circle: ");
    scanf("%d", &yc);
    d = 1-r;
    x=0;
    y=r;
    while(x<y){
        if(d<0){
            x = x+1;
            d = d+2*x+1;
        }
        else{
            x = x+1;
            y = y+1;
            d = d+2*x-2*y+10;
        }
        putpixel(xc+x, yc+y, WHITE);
        putpixel(xc-y, yc-x, WHITE);

        putpixel(xc+y, yc-x, WHITE);
        putpixel(xc-y, yc+x, WHITE);

        putpixel(xc+y, yc+x, WHITE);
        putpixel(xc-x, yc-y, WHITE);

        putpixel(xc+x, yc+y, WHITE);
        putpixel(xc-x, yc+y, WHITE);
    }

    getch();
    delay(100);
    return 0;
}