设计模式之组合模式

组合模式(Composite)属于结构模式，如果多个对象的调用是相似的，对象可以单独用，也可以多个一起用，特别是需要将多个对象组合起来用，但是调用的方法要和单独调用是一样的，这种情况下就可以采用组合模式。
下面是组合模式的C++实现，代码可到本人github网页下载：设计模式例子

/* * Example of 'Composite' design pattern. * Copyright (C) 2016 Leo Wang * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */#include <iostream>#include <vector>using namespace std;class CComponent{    public:        virtual void Do()=0;};class CConcreteComponentA:public CComponent{    public:        void Do()        {            cout<<"ComponentA Do!"<<endl;        };};class CConcreteComponentB:public CComponent{    public:        void Do()        {            cout<<"ComponentB Do!"<<endl;        };};class CComposite:public CComponent{    public:        vector<CComponent*> v_components;    public:        void Add(CComponent* p_component)        {            v_components.push_back(p_component);        };        void Do()        {            for(auto &component:v_components)            {                component->Do();            }        };};int main(){    CComponent* cp_componentA=new CConcreteComponentA();    CComponent* cp_componentB=new CConcreteComponentB();    CComposite* cp_composite=new CComposite();    CComponent* cp_components=cp_composite;    cp_composite->Add(cp_componentA);    cp_composite->Add(cp_componentB);    cp_componentA->Do();    cp_componentB->Do();    cp_composite->Do();    return 1;}