学步园

#include <iostream>
#include <string>
#include <vector>
using namespace std;

class component
{
public:
    virtual ~component(){}

    virtual void operation() =0;
    virtual void add(component *) =0;
    virtual void remove(component *) =0;
    virtual component *get_child(int ) =0;
};

class composite : public component
{
public:
    void operation()
    {
        for (vector<component*>::iterator it = coms.begin();
            it != coms.end(); ++it)
        {
            (*it)->operation();
        }
    }

    void add(component *com)
    {
        coms.push_back(com);
    }

    void remove(component *com)
    {
        for (vector<component*>::iterator it = coms.begin();
            it != coms.end(); ++it)
        {
            if ((*it) == com)
            {
                coms.erase(it);
                break;
            }
        }
    }

    component *get_child(int index)
    {
        return coms[index];
    }
private:
    vector<component*> coms;
};

class leaf : public component
{
public:
    void operation()
    {
        cout<< "leaf::operation()"<<endl;
    }
private:
    void add(component *com){}
    void remove(component *com){}
    component *get_child(int index){}
};

int main()
{
    leaf *l = new leaf;
    l->operation();
    composite *com = new composite();
    com->add(l);
    com->operation();
    component *ll = com->get_child(0);
    ll->operation();
    return 0;
}

///////////////////////////////////////////
#include <iostream>
#include <string>
#include <vector>
using namespace std;

class company
{
public:
    company(string name):m_name(name){}
    virtual ~company(){}
    virtual void add(company *c) =0;
    virtual void remove(company *c) =0;
    virtual void display(int depth) =0;
    virtual void line_of_duty() =0;
protected:
    string m_name;
};

class concrete_company : public company
{
public:
    concrete_company(string name):company(name){}
    ~concrete_company()
    {
        for (vector<company*>::iterator it = coms.begin();
            it != coms.end(); ++it)
        {
            delete *it;
        }        
    }
    void add(company *c)
    {
        coms.push_back(c);
    }
    void remove(company *c)
    {
        for (vector<company*>::iterator it = coms.begin();
            it != coms.end(); ++it)
        {
            if ( (*it) == c)
            {
                coms.erase(it);
                break;
            }
        }
    }
    void display(int depth)
    {
        for (int i = 0; i < depth; ++i)
            cout<<"-";
        cout<<m_name<<endl;
        for (vector<company*>::iterator it = coms.begin();
            it != coms.end(); ++it)
        {
            (*it)->display(depth + 2);
        }
    }

    void line_of_duty()
    {
        for (vector<company*>::iterator it = coms.begin();
            it != coms.end(); ++it)
            (*it)->line_of_duty();
    }

private:
    vector<company*> coms;        

};

class hr_department : public company
{
public:
    hr_department(string name):company(name){}
    void display(int depth)
    {
        for (int i = 0; i < depth; ++i)
            cout << "-"; 
        cout<<m_name<<endl;
    }
    void line_of_duty()
    {
        cout << m_name << " 员工招聘培训管理"<<endl;
    }
private:
    void add(company *c){}
    void remove(company *c){}
};

class finace_department: public company
{
public:
    finace_department(string name):company(name){}
    void display(int depth)
    {
        for (int i = 0; i < depth; ++i)
            cout << "-"; 
        cout<<m_name<<endl;
    }
    void line_of_duty()
    {
        cout <<m_name << " 公司财务收支管理" <<endl;
    }
private:
    void add(company *c){}
    void remove(company *c){}
};

int main()
{
    concrete_company root("北京总公司");
    root.add(new hr_department("总公司人力资源部"));
    root.add(new finace_department("总公司财务部"));

    concrete_company comp("上海华东分公司");
    comp.add(new hr_department("华东分公司人力资源部"));
    comp.add(new finace_department("华东分公司财务部"));
    root.add(&comp);

    concrete_company comp1("南京办事处");
    comp1.add(new hr_department("南京办事处人力资源部"));
    comp1.add(new finace_department("南京办事处财务部"));
    root.add(&comp1);

    concrete_company comp2("杭州办事处");
    comp2.add(new hr_department("杭州办事处人力资源部"));
    comp2.add(new finace_department("杭州办事处财务部"));
    root.add(&comp2);

    cout << "结构图" <<endl;
    root.display(1);
    
    cout<<"职责"<<endl;
    root.line_of_duty();
    cout << "end" <<endl;
    return 0;
}