gray035

摘要： View Code #include <iostream>#include <cstdio>#include <cstring>#include <cmath>using namespace std;#define P(x) (x)*(x)class Point { friend class B;public: Point(double x=0,double y=0) { X = x; Y = y; } Point(Point &a); double get_x(); double get_y(); friend doubl... 阅读全文