摘要：
杭电2056：Rectangles博客：KingsView Code 1 #include<iostream> 2 #include<iomanip> 3 using namespace std; 4 5 class p 6 { 7 public: 8 double x; 9 double y;10 friend istream& operator >>(istream& in, p& x);11 };12 13 istream& operator >>(istream& in, p& a)14 { 阅读全文