标签：crete begin ted int ack tar 部分 let pre
使用场景：将对象组合成树形结构以表示“部分-整体”的层次结构，组合模式使得用户对单个对象和组合对象的使用具有一致性。
例子：比如一个集团公司，它有一个母公司，下设很多家子公司。不管是母公司还是子公司，都有各自直属的财务部、人力资源部、销售部等。对于母公司来说，不论是子公司，还是直属的财务部、人力资源部，都是它的部门。整个公司的部门拓扑图就是一个树形结构。
class Company
{
public:
Company(string name) { m_name = name; }
virtual ~Company(){}
virtual void Add(Company *pCom){}
virtual void Show(int depth) {}
protected:
string m_name;
};
//具体公司
class ConcreteCompany : public Company
{
public:
ConcreteCompany(string name): Company(name) {}
virtual ~ConcreteCompany() {}
void Add(Company *pCom) { m_listCompany.push_back(pCom); } //位于树的中间，可以增加子树
void Show(int depth)
{
for(int i = 0;i < depth; i++)
cout<<"-";
cout<<m_name<<endl;
list<Company *>::iterator iter=m_listCompany.begin();
for(; iter != m_listCompany.end(); iter++) //显示下层结点
(*iter)->Show(depth + 2);
}
private:
list<Company *> m_listCompany;
};
//具体的部门，财务部
class FinanceDepartment : public Company
{
public:
FinanceDepartment(string name):Company(name){}
virtual ~FinanceDepartment() {}
virtual void Show(int depth) //只需显示，无限添加函数，因为已是叶结点
{
for(int i = 0; i < depth; i++)
cout<<"-";
cout<<m_name<<endl;
}
};
//具体的部门，人力资源部
class HRDepartment :public Company
{
public:
HRDepartment(string name):Company(name){}
virtual ~HRDepartment() {}
virtual void Show(int depth) //只需显示，无限添加函数，因为已是叶结点
{
for(int i = 0; i < depth; i++)
cout<<"-";
cout<<m_name<<endl;
}
};
使用：
int main()
{
Company *root = new ConcreteCompany("总公司");
Company *leaf1=new FinanceDepartment("财务部");
Company *leaf2=new HRDepartment("人力资源部");
root->Add(leaf1);
root->Add(leaf2);
//分公司A
Company *mid1 = new ConcreteCompany("分公司A");
Company *leaf3=new FinanceDepartment("财务部");
Company *leaf4=new HRDepartment("人力资源部");
mid1->Add(leaf3);
mid1->Add(leaf4);
root->Add(mid1);
//分公司B
Company *mid2=new ConcreteCompany("分公司B");
FinanceDepartment *leaf5=new FinanceDepartment("财务部");
HRDepartment *leaf6=new HRDepartment("人力资源部");
mid2->Add(leaf5);
mid2->Add(leaf6);
root->Add(mid2);
root->Show(0);
delete leaf1; delete leaf2;
delete leaf3; delete leaf4;
delete leaf5; delete leaf6;
delete mid1; delete mid2;
delete root;
return 0;
}
参考：https://blog.csdn.net/wuzhekai1985/article/details/6667564
标签：crete begin ted int ack tar 部分 let pre
原文地址：https://www.cnblogs.com/xiaoxiaoji/p/9435029.html
