C++基类派生类

// C++_test1.cpp : 定义控制台应用程序的入口点。//#include "stdafx.h"#include<iostream>#include<string>#include<cctype>#include<fstream>// using namespace std;using std::cin;using std::cout;using std::endl;using std::string;using std::ifstream;//基类class BaseClass {public:BaseClass() {}void f(char*s = "unknown") {cout << "Function f() in BaseClass called from " << s << endl;h();}protected:void g(char*s = "unknown") {cout << "Function g() in BaseClass is called from " << s << endl;}private:void h() {cout << "Function h() in BaseClass\n";}};//派生类class Derived1Level1 :public virtual BaseClass {public:void f(char*s = "unknown") {cout << "Function f() in Derived1Level1 is called from " << s << endl;g("Derived1Level1");h("Derived1Level1");}void h(char*s = "unknown") {cout << "Function h() in Derived1Level1 is called from " << s << endl;}};//派生类class Derived2Level1 :public virtual BaseClass {public:void f(char*s = "unknown") {cout << "Function f() in Derived2Level1 is called from " << s << endl;g("Derived2Level1");}};class Derived2Level2 :public Derived1Level1, public Derived2Level1 {public:void f(char*s = "unknown") {cout << "Function f() in Derived2Level2 is called from " << s << endl;g("Derived2Level2");Derived1Level1::h("Derived2Level2");BaseClass::f("Derived2Level2");}};int main() {BaseClass bc;Derived1Level1 d1ll;Derived2Level1 d2ll;Derived2Level2 d22;bc.f("main(1)");d1ll.f("main(2)");d1ll.h("main(3)");d2ll.f("main(4)");d22.f("main(5)");d22.h();//暂停，供用户按下enter// system("pause");cin.ignore();return 0;}