Driver code
public static void Main ( string [ ] arr ) { int h = 0 , k = 0 , x = 2 , y = 1 , a = 4 ; if ( checkpoint ( h , k , x , y , a ) > 0 ) { Console . WriteLine ( " Outside " ) ; } else if ( checkpoint ( h , k , x , y , a ) == 0 ) { Console . WriteLine ( " On ▁ the ▁ parabola " ) ; } else { Console . WriteLine ( " Inside " ) ; } } }