多继承方式构造函数析构函数

最新推荐文章于 2022-03-08 21:26:20 发布

原创最新推荐文章于 2022-03-08 21:26:20 发布 · 352 阅读

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#constructor #class #include #c

本文介绍了一个C++程序示例，该程序演示了如何使用多重继承创建派生类，并展示了基类构造函数的调用顺序及作用域解析。通过具体的代码实现，读者可以了解在C++中如何定义和使用不同访问级别的基类。

#include <iostream> using namespace std; class Base1 { private: int x; public: Base1(int a=1) { x=a; cout<<"Base1 constructor x="<<x<<endl; } ~Base1() {cout<<"Base1 destructor..."<<endl;} }; class Base2 { private: int y; public: Base2(int a) { y=a; cout<<"Base2 constructor y="<<y<<endl; } ~Base2() { cout<<"Base2 destructor..."<<endl; } }; class Base3 { private: int z; public: Base3(int a) { z=a; cout<<"Base3 constructor z="<<z<<endl; } ~Base3() { cout<<"Base3 destructor..."<<endl; } }; class Derived:public Base1,protected Base2,private Base3 { private: int y; public: Derived(int a,int b,int c):Base3(b),Base2(a) { y=c; cout<<"Derived constructor y="<<y<<endl; } ~Derived() {cout<<"Derived destructor..."<<endl;} }; void main() { Derived d(2,3,4); }