salam .yebarname daram minevisam ke az chandta kelas tashkil shode..yeki az kelasam : class point hastesh va oon yeki class line..tooye kelase line ye tabe daram mikham behem bege ke 2khat barham amood hastan ya na.
(bool isPrependicular(line* N
{
if((N->m*this->m) == -1) return true...