C++程序设计

显示全部楼层 · 2010-4-28 14:27:58

#include#includeusing namespace std;class Point{public: Point(); virtual ~Point(); int PrintCount(); friend float JL(Point &pa, Point &pb);protected:int m_x;
int m_y; int m_count;};Point::Point(){m_count+=1;}Point::~Point(){m_count-=1;}int Point::PrintCount(){return m_count;}float JL(Point &pa, Point &pb){return sqrt((pa.m_x-pb.m_x)*(pa.m_x-pb.m_x)+(pa.m_y-pb.m_y)*(pa.m_y-pb.m_y));}void main(){}