#pragma once #include "stdafx.h" #include<set> #include<string> #include<iostream> using namespace std;/* 設(shè)計(jì)模式-組合模式（Composite）[用類建一棵樹]將對(duì)象組合成樹形結(jié)構(gòu)以表示 部分-整體 的層次結(jié)構(gòu)。組合模式使得用戶對(duì) 單個(gè)對(duì)象和組合對(duì)象的使用具有一致性。 */class CComponent {//所有節(jié)點(diǎn)統(tǒng)一接口 protected:string m_strName; public:CComponent(const string &strName) {m_strName = strName;}virtual void Add(CComponent * const pc) = 0;virtual void Remove(CComponent * const pc) = 0;virtual void Display(const int & nDepth) = 0; };class CLeaf : public CComponent { public:CLeaf(const string &strName) : CComponent(strName) {}void Add(CComponent *const pc) {cout << "Cannot add to a leaf" << endl;}void Remove(CComponent *const pc) {cout << "Cannot remove from a leaf" << endl;}void Display(const int &nDepth) {cout << "-" << nDepth << ":" << m_strName << endl;} };class CCpmposite : public CComponent { private:set<CComponent*>m_cChildren; public:CCpmposite(const string &strName) : CComponent(strName) {m_cChildren.clear();}void Add(CComponent * const pc) {m_cChildren.insert(pc);}void Remove(CComponent * const pc) {m_cChildren.erase(pc);delete pc;}void Display(const int &nDepth) {cout << "-" << nDepth << ":" << m_strName << endl;for each(auto i in m_cChildren) {i->Display(nDepth + 1);}}~CCpmposite() {for each(auto i in m_cChildren) {delete i;}} };int main() {CCpmposite *pRoot = new CCpmposite("root");pRoot->Add(new CLeaf("Lead A"));pRoot->Add(new CLeaf("Lead B"));CCpmposite *pComp = new CCpmposite("Composite X");pComp->Add(new CLeaf("Lead A"));pComp->Add(new CLeaf("Lead B"));pRoot->Add(pComp);pRoot->Display(1);delete pRoot;getchar();return 0; }

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