void print_byte_array(byte* arr, int w, int h) {
    printf("\n[ ");
    for (int y = 0; y < h; y++) {
        for (int x = 0; x < w; x++) {
            printf("%d, ", arr[x+y*h]);
        }
        printf("\n  ");
    }
    printf("]\n");
}
#define plot(x,y) arr[(x)+((y)*20)] = 1

void symmetry(int x,int y,int xc,int yc,byte* arr)
{
 plot(xc+x,yc-y);//For pixel (x,y)
 plot(xc+y,yc-x);//For pixel (y,x)
 plot(xc+y,yc+x);//For pixel (y,-x)
 plot(xc+x,yc+y);//For pixel (x,-y)
 plot(xc-x,yc+y);//For pixel (-x,-y)
 plot(xc-y,yc+x);//For pixel (-y,-x)
 plot(xc-y,yc-x);//For pixel (-y,x)
 plot(xc-x,yc-y);//For pixel (-x,y)
}

void raster_circle(int xc,int yc,int rad) {
    byte arr[20*15];
    ZeroMemory(arr,20*15);
   int x = 0;
 int y = rad;
 int p = 1-rad;
 symmetry(x,y,xc,yc,(byte*)arr);


 for(x= 0;y>x;x++)
    {
    if(p<0)
       p += 2*x + 3;
    else
      {
       p += 2*(x-y) + 5;
       y--;
      }
    symmetry(x,y,xc,yc,(byte*)arr);
     }

    print_byte_array((byte*)arr,20,15);
}