circle_draw_using_decard

#include <graphics.h>
#include <math.h>
void safe_putpixel(int x, int y, int color) {
putpixel(
x < 0 ? 0 : x,
y < 0 ? 0 : y,
color);
}
void draw_circle(int x, int y, int radius) {
int diameter = radius * 2;
for (int i = 0; i < diameter; i++) {
int xshift = sqrt(pow(radius, 2) - pow(i, 2));
for (int j = 0; j < xshift; j++) {
safe_putpixel(x + j, y - i, GREEN);
safe_putpixel(x + j, y + i, GREEN);
safe_putpixel(x + j - xshift, y - i, GREEN);
safe_putpixel(x + j - xshift, y + i, GREEN);
}
}
}
int main() {
int graphics_driver = DETECT;
int gmode;
initgraph(&graphics_driver, &gmode, "");
draw_circle(0, 50, 10);

getch();
closegraph();
return 0;
}