如何使用C++语言开发嵌入式系统的实时文件系统功能

#include <fstream>
#include <iostream>
using namespace std;

class MyFileSystem {
public:
    MyFileSystem(const string& filename) : m_filename(filename) {}

    bool createFile() {
        ofstream file(m_filename);
        if (!file) {
            cerr << "Failed to create file: " << m_filename << endl;
            return false;
        }
        return true;
    }

    bool writeData(const string& data) {
        ofstream file(m_filename, ios::app);
        if (!file) {
            cerr << "Failed to open file: " << m_filename << endl;
            return false;
        }
        file << data;
        return true;
    }

    string readData() {
        string data;
        ifstream file(m_filename);
        if (!file) {
            cerr << "Failed to open file: " << m_filename << endl;
            return "";
        }
        getline(file, data);
        return data;
    }

private:
    string m_filename;
};

int main() {
    MyFileSystem fs("data.txt");
    fs.createFile();
    fs.writeData("Hello, world!");
    string data = fs.readData();
    cout << "Data: " << data << endl;
    return 0;
}