[c++]衍生類別與容器類

標籤：c++   派生   繼承   

#include<iostream>using namespace std;class Base{    int x;public:    Base(int a)    {        x = a;//記得給私人成員賦初值，沒有的話會是隨機值        cout<<"constructing Base "<<x<<endl;    }    ~Base()    {        cout<<"destructing Base "<<x<<endl;    }};class Derived:public Base//基類{    int y;    Base B1,B2;//容器類public:    Derived(int a,int b,int c,int d):Base(a),y(b),B1(c),B2(d)//並不按參數列表的順序定義，而是按照先基類，再容器類，最後子類的順序定義    {cout<<"constructing Derived "<<y<<endl;}    ~Derived()    {cout<<"destructing Dervied "<<y<<endl;}};int main(){    Derived D(1,2,3,4);    return 0;}

[c++]衍生類別與容器類