摘要：
#include#include#include#include using namespace std;class CShape{public: virtual double Area() = 0;//pure virtual fun virtual void PrintInfo()= 0;};c... 阅读全文
摘要：
#includeusing namespace std;class Base{ public: int n; Base(int i):n(i) { cout<<"Base "<<n<<" constructed"<<endl; } ~Base(){ cout<<"Base "<<n... 阅读全文
摘要：
//人狗关系#includeusing namespace std;class Cmaster;class Cdog{ Cmaster *pm;};class Cmaster{ Cdog *dogs[10]; };int main(){ Cmaster alf;} 阅读全文