text: The lines are parallel . This is simplified by returning a pair of FLT_MAX
code: return make_pair ( FLT_MAX , FLT_MAX ) ; } else { double x = ( b2 * c1 - b1 * c2 ) / determinant ; double y = ( a1 * c2 - a2 * c1 ) / determinant ; return make_pair ( x , y ) ; } } void findCircumCenter ( pdd P , pdd Q , pdd R ) {