软件设计 石家庄铁道大学信息学院
实验10：组合模式
本次实验属于模仿型实验，通过本次实验学生将掌握以下内容：
1、理解组合模式的动机，掌握该模式的结构；
2、能够利用组合模式解决实际问题。
[实验任务一]：组合模式
用透明组合模式实现教材中的“文件夹浏览”这个例子。
实验要求：
1.
2.提交源代码；
#include <iostream>
#include <string>
#include <list>
using namespace std;
class Component
{
protected:
string name;
public:
Component(string name)
:name(name)
{ }
virtual void AddComponent(Component *component) { }
virtual void RemoveComponent(Component *component) { }
virtual void GetChild(int depth) { }
};
class Leaf: public Component
{
public:
Leaf(string name)
:Component(name)
{ }
void AddComponent(Component *component)
{
cout<<"can't add"<<endl;
}
void RemoveComponent(Component *component)
{
cout<<"can't remove"<<endl;
}
void GetChild(int depth)
{
string _tmpstring(depth, '-');
cout<<_tmpstring<<name<<endl;
}
};
class Composite:public Component
{
private:
list<Component*> _componets;
public:
Composite(string name)
:Component(name)
{ }
void AddComponent(Component *component)
{
_componets.push_back(component);
}
void RemoveComponent(Component *component)
{
_componets.remove(component);
}
void GetChild(int depth)
{
string tmpstring (depth, '-');
cout<<tmpstring<<name<<endl;
list<Component*>::iterator iter = _componets.begin();
for(; iter != _componets.end(); iter++)
{
(*iter)->GetChild(depth + 2);
}
}
};
main()
{
Composite *root = new Composite("root");
Leaf *leaf1 = new Leaf("A");
Leaf *leaf2 = new Leaf("B");
root->AddComponent(leaf1);
root->AddComponent(leaf2);
Composite *lay2 = new Composite("AA");
Leaf *leaf4 = new Leaf("BB");
lay2->AddComponent(leaf4);
Composite *lay1 = new Composite("CC");
Leaf *leaf3 = new Leaf("C");
lay1->AddComponent(leaf3);
lay1->AddComponent(lay2);
root->AddComponent(lay1);
root->GetChild(1);
cout<<endl;
lay1->GetChild(1);
cout<<endl;
lay2->GetChild(1);
delete root;
delete lay1;
delete lay2;
delete leaf1;
delete leaf2;
delete leaf3;
delete leaf4;
}
3.注意编程规范。