用c++编写一个简单的文件管理程序采用二级目录实现文件管理

这里提供一个简单的二级目录文件管理程序的实现，包括添加文件、删除文件和查看文件列表等功能。

#include <iostream>
#include <string>
#include <vector>

using namespace std;

class File {
public:
    File(const std::string& name, int size, const std::string& content);
    std::string getName() const;
    int getSize() const;
    std::string getContent() const;
private:
    std::string name_;
    int size_;
    std::string content_;
};

class Directory {
public:
    Directory(const std::string& name);
    std::string getName() const;
    void addFile(const File& file);
    void removeFile(const std::string& name);
    void printFiles() const;
private:
    std::string name_;
    std::vector<File> files_;
};

class FileSystem {
public:
    FileSystem();
    void addFile(const std::string& path, const File& file);
    void removeFile(const std::string& path, const std::string& name);
    void printFiles(const std::string& path) const;
private:
    Directory root_;
    Directory* findDirectory(const std::string& path) const;
    File* findFile(const std::string& path, const std::string& name) const;
};

File::File(const std::string& name, int size, const std::string& content) : 
    name_(name), size_(size), content_(content) {}

std::string File::getName() const {
    return name_;
}

int File::getSize() const {
    return size_;
}

std::string File::getContent() const {
    return content_;
}

Directory::Directory(const std::string& name) : name_(name) {}

std::string Directory::getName() const {
    return name_;
}

void Directory::addFile(const File& file) {
    files_.push_back(file);
}

void Directory::removeFile(const std::string& name) {
    for (auto it = files_.begin(); it != files_.end(); ++it) {
        if (it->getName() == name) {
            files_.erase(it);
            break;
        }
    }
}

void Directory::printFiles() const {
    std::cout << "Files in directory " << name_ << ":\n";
    for (const auto& file : files_) {
        std::cout << "- " << file.getName() << " (" << file.getSize() << " bytes)\n";
    }
}

FileSystem::FileSystem() : root_("root") {}

void FileSystem::addFile(const std::string& path, const File& file) {
    int idx = path.find('/');
    std::string dirName = path.substr(0, idx);
    std::string fileName = path.substr(idx + 1);
    Directory* dir = findDirectory(dirName);
    if (!dir) {
        std::cout << "Directory " << dirName << " not found.\n";
        return;
    }
    dir->addFile(file);
}

void FileSystem::removeFile(const std::string& path, const std::string& name) {
    int idx = path.find('/');
    std::string dirName = path.substr(0, idx);
    std::string fileName = path.substr(idx + 1);
    Directory* dir = findDirectory(dirName);
    if (!dir) {
        std::cout << "Directory " << dirName << " not found.\n";
        return;
    }
    dir->removeFile(name);
}

void FileSystem::printFiles(const std::string& path) const {
    Directory* dir = findDirectory(path);
    if (!dir) {
        std::cout << "Directory " << path << " not found.\n";
        return;
    }
    dir->printFiles();
}

Directory* FileSystem::findDirectory(const std::string& path) const {
    if (path == "root") {
        return const_cast<Directory*>(&root_);
    }
    int idx = path.find('/');
    std::string dirName = path.substr(0, idx);
    std::string subPath = path.substr(idx + 1);
    for (auto& dir : root_.subDirectories_) {
        if (dir.getName() == dirName) {
            if (subPath.empty()) {
                return const_cast<Directory*>(&dir);
            } else {
                return dir.findDirectory(subPath);
            }
        }
    }
    return nullptr;
}

File* FileSystem::findFile(const std::string& path, const std::string& name) const {
    int idx = path.find('/');
    std::string dirName = path.substr(0, idx);
    std::string fileName = path.substr(idx + 1);
    Directory* dir = findDirectory(dirName);
    if (!dir) {
        return nullptr;
    }
    for (auto& file : dir->files_) {
        if (file.getName() == name) {
            return const_cast<File*>(&file);
        }
    }
    return nullptr;
}

int main() {
    FileSystem fs;
    fs.addFile("root/documents", File("report.docx", 1024, "This is a report."));
    fs.addFile("root/pictures", File("photo.jpg", 2048, "This is a photo."));
    fs.printFiles("root/documents");
    fs.removeFile("root/documents", "report.docx");
    fs.printFiles("root/documents");
    return 0;
}

上面的代码实现了一个基本的二级目录文件管理系统，可以根据需要进行扩展。注意，这里只是提供了一种简单的实现方式，实际上实现一个完整的文件管理系统需要考虑更多的细节和功能。