[c++]多繼承

標籤：c++   派生   類   繼承   

多繼承格式：

class 類名:繼承方式1 基類1，繼承方式2 基類2，........

#include<iostream>using namespace std;class X{    int x;public:    X(int a = 0)    {x = a;cout<<"constructing X "<<x<<endl;}    void set_x(int a)    {x = a;}    void show_x()    {cout<<"x = "<<x<<endl;}    ~X()    {cout<<"destructing X "<<x<<endl;}};class Y{    int y;public:    Y(int a = 0)    {y = a;cout<<"constructing Y "<<y<<endl;}    void set_y(int b)    {y = b;}    void show_y()    {cout<<"y = "<<y<<endl;;}    ~Y()    {cout<<"destructing Y "<<y<<endl;}};class Z:public X,public Y//多繼承{    int z;public:    Z(int a = 0,int b = 0,int c = 0):X(a),Y(b)    {        z = c;        cout<<"constructing Z "<<z<<endl;    }    void set_xyz(int a,int b,int c)    {        set_x(a);        set_y(b);        z = c;    }    void show_z()    {        cout<<"z = "<<z<<endl;    }    void show()    {        show_x();        show_y();        cout<<"z = "<<z<<endl;//類內可直接用    }    ~Z()    {cout<<"destructing Z "<<z<<endl;}};int main(){    Z obj1(3,4,5);    Z obj2;    obj2.set_xyz(10,20,30);    obj1.show_x();    obj1.show_y();    obj1.show_z();    obj2.show();    return 0;}

[c++]多繼承