composite模式

以基类为根节点，共三类

叶子节点类

其他..(非根 非叶子)

composite.h

#ifndef _COMPOSITE_H

#define _COMPOSITE_H

#include <vector>

#include <iostream>

using namespace std;

class Component{

public:

Component() {}

virtual ~Component() {}

public:

virtual void Operation()=0;

virtual void Add(const Component&) {}

virtual void Remove(const Component&) {}

virtual Component* GetChild(int) {}

};

class Composite : public Component

{

public: Composite() {};

~Composite() {}

public:

void Add(Component* com) { comVec.push_back(com); }

void Remove(Component *com)

{ vector::iterator comIter = comVec.begin(); for (; comIter != comVec.end(); comIter++) { if (*comIter == com) { comVec.erase(comIter); } } }

Component* GetChild(int index) { return comVec[index]; }

void Operation()

{ vector::iterator comIter = comVec.begin(); for (; comIter != comVec.end(); comIter++) { (*comIter)->Operation(); } }

private:

vectorcomVec;

};

class Leaf : public Component

{

public:

Leaf() {}

~Leaf() {}

void Operation() {

cout << "Leaf operation" << endl;

}

};

#endif // _COMPOSITE_H

composite.cpp

#include "composite.h"

int main()

{

Leaf* l = new Leaf;

l->Operation();

Composite* com = new Composite;

com->Add(l);

com->Operation();

Component* ll = com->GetChild(0);

ll->Operation();

return 0;

}

编译:make composite