There are N students in a class. Some of them are friends, while some are not. Their friendship is transitive in nature. For example, if A is a direct friend of B, and B is a&nb...
#include<iostream> using namespace std; template<class T> class Complex{ public: Complex(T a, T b); void setComplex(T a,T b); friend Complex<T> operator+(const Complex<T>...
传送门 题目大意 给出两个数 x , y x,y x,y,问能否找到另外一个非负整数 n n n,使得 x + n x+...
文章转自公众号:coder梁(id:coder_lt) 我们知道c++控制对象的私有部分的访问,只能通过公共的接口。这样的设计当然没错,但有的时候也会显得过于严格,产生一些问题。 因此c++提供了另外一种形式的访问...