2024.11.6（周三）

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.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；

3.注意编程规范。

 

 

1、类图

 

 

2、源代码

#include <iostream>

#include <string>

#include<list>

using namespace std;

 

class AbstractFile

{

public:

    virtual void add() {   }

    virtual void remove() {   }

    virtual void display() { }

};

 

class ImageFile : public AbstractFile

{

private:

    string fileName;

public:

    ImageFile(string filename)

    {

        fileName = filename;

     }

      void add()

     {

          cout << "添加成功" << endl;

     }

     void remove()

     {

         cout << "删除成功" << endl;

      }

      void display()

      {

         cout << fileName << endl;

      }

  };

 

 

  class TextFile : public AbstractFile

  {

  private:

      string fileName;

  public:

      TextFile(string filename)

      {

          fileName = filename;

      }

      void add()

      {

          cout << "添加成功" << endl;

      }

      void remove()

      {

          cout << "删除成功" << endl;

      }

      void display()

      {

          cout << fileName << endl;

      }

  };

 

  class VideoFile : public AbstractFile

  {

  private:

      string fileName;

  public:

      VideoFile(string filename)

      {

          fileName = filename;

      }

      void add()

      {

         cout << "添加成功" << endl;

      }

      void remove()

      {

          cout << "删除成功" << endl;

      }

      void display()

      {

          cout << fileName << 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()

 {

   

     int choice;

     bool flag = true;

     cout << "输入根目录文件夹名：" << endl;

     string str;

     cin >> str;

     Folder* fold3 = new Folder(str);

     Folder* fold1 = NULL;

     Folder* fold2 = NULL;

     Folder* fold4 = NULL;

    AbstractFile* obj1 = NULL;

    AbstractFile* obj2 = NULL;

     AbstractFile* obj4 = NULL;

     while(flag){

         cout << "1、创建图像文件夹" << endl;

        cout << "2、创建视频文件夹" << endl;

         cout << "3、创建文本文件夹" << endl;

         cout << "4、展示文件夹" << endl;

        cout << "5、退出" << endl;

         cout << "******请选择******" << endl;

         cin >> choice;

         if (choice==1) {

             cout << "请输入文件夹名：";

             string name;

             cin >> name;

             fold1 = new Folder(name, 1);

             cout << "请输入文件名：";

             string name1;

             cin >> name1;

             obj1 = new ImageFile(name1);

             fold1->add(obj1);

            fold3->add(fold1);

         }

         else if (choice == 2) {

            cout << "请输入文件夹名：";

            string name;

             cin >> name;

             fold2 = new Folder(name, 1);

             cout << "请输入文件名：";

            string name1;

            cin >> name1;

            obj2 = new VideoFile(name1);

             fold2->add(obj2);

            fold3->add(fold2);

        }

       

         else if (choice == 3) {

            cout << "请输入文件夹名：";

             string name;

             cin >> name;

            fold4 = new Folder(name, 1);

             cout << "请输入文件名：";

            string name1;

            cin >> name1;

            obj4 = new TextFile(name1);

            fold4->add(obj4);

            fold3->add(fold4);

        }

       else if (choice == 4) {

            fold3->display();

       }

        else if (choice == 5) {

            cout << "****再见******" << endl;

           

            flag = false;

        }

        else {

            cout << "输入错误！！！！" << endl;

            flag = false;

           

       }

    }

    delete obj1, obj2, obj4;

    delete fold1, fold2, fold3, fold4;

   

}