Print points based on 4 - way symmetry
cout << x + xc << " ▁ , ▁ " << y + yc << endl ; cout << - x + xc << " ▁ , ▁ " << y + yc << endl ; cout << x + xc << " ▁ , ▁ " << - y + yc << endl ; cout << - x + xc << " ▁ , ▁ " << - y + yc << endl ;