组合模式

[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。

1. 文件的执行不需真正实现，只需简单提示即可

2. 提交源代码；

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

class AbstractFile
{
    public:
    virtual void add(AbstractFile* abstractfile){};
    virtual void remove(AbstractFile* abstractfile){};
    virtual void display(){};
};

class ImageFile: public AbstractFile
        {
private:
        string fileName;
public:
        ImageFile(string filename)
        {
        fileName = filename;
        }
        void add(AbstractFile* abstractfile)
        {
        cout << "添加文件" << endl;
        }
        void remove(AbstractFile* abstractfile)
        {
        cout << "移动文件" << endl;
        }
        void display()
        {
        cout << fileName <<" 文件名"<< endl;
        }
        };


class TextFile : public AbstractFile
        {
private:
        string fileName;
public:
        TextFile(string filename)
        {
        fileName = filename;
        }
        void add(AbstractFile* abstractfile)
        {
        cout << "添加文件" << endl;
        }
        void remove(AbstractFile* abstractfile)
        {
        cout << "移动文件" << endl;
        }
        void display()
        {
        cout << fileName <<" 文件名"<< endl;
        }
        };

class VideoFile : public AbstractFile
        {
private:
        string fileName;
public:
        VideoFile(string filename)
        {
        fileName = filename;
        }
        void add(AbstractFile* abstractfile)
        {
        cout << "添加文件" << endl;
        }
        void remove(AbstractFile* abstractfile)
        {
        cout << "r移动文件" << endl;
        }
        void display()
        {
        cout << fileName <<" 文件名"<< endl;
        }
        };

class Folder: public  AbstractFile
        {
private:
        string fileName;
        int level;
        list<AbstractFile*> abstractfiles;

public:
        Folder(string filename)
        {
        fileName = filename;
        }
        Folder(string filename,int level)
        {
        fileName = filename;
        this->level = level;
        }
        void add(AbstractFile* abstractfile)
        {
        abstractfiles.push_front(abstractfile);
        }
        void remove(AbstractFile* abstractfile)
        {
        abstractfiles.remove(abstractfile);
        }
        void  display()
        {
        cout << fileName << endl;
        list<AbstractFile*>::iterator iter = abstractfiles.begin();
        for (; iter != abstractfiles.end(); iter++)
        {
        if (this->level != 1)
        {
        cout << "  " ;
        (*iter)->display();
        }
        else {
        cout << "     " ;
        (*iter)->display();
        }
        }
        }
        };

        int main()
        {
        AbstractFile *obj1,*obj2,*obj3,*obj4;
        Folder *fold1,*fold2,*fold3;
        obj1 = new ImageFile("a.jpg");
        obj2 = new TextFile("b.txt");
        fold1 = new Folder("Image_Text", 1);
        fold1->add(obj1);
        fold1->add(obj2);

        obj3 = new VideoFile("c.mp4");
        fold2 = new Folder("Image_Video", 1);
        fold2->add(obj1);
        fold2->add(obj3);

        obj4 = new ImageFile("d.jpg");
        fold3 = new Folder("Image_Text_Video_Folder");
        fold3->add(fold1);
        fold3->add(fold2);
        fold3->add(obj4);
        fold3->display();

        delete obj1, obj2, obj3, obj4;
        delete fold1, fold2, fold3;
        }