以下定义一个数据结构

struct SData {std::string url;int number;std::string memo;
};

写入文件

void StorageDataToFile(const std::string& filename, const SData& data) {std::ofstream outFile(filename);if (outFile.is_open()) {// 使用std::stringstream格式化数据std::stringstream ss;ss << data.url << "," << data.member << "," << data.memo << "\n";// 将格式化后的字符串写入文件outFile << ss.str();outFile.close();AfxMessageBox(L"ok storage") ;}else {AfxMessageBox(L"error");}
}

读取

UserData ReadDataFromFile(const std::string& filename) {SData data;std::ifstream inFile(filename);if (inFile.is_open()) {std::string line;getline(inFile, line);std::istringstream iss(line);if (iss >> data.url>> data.number >> data.memo) {inFile.close();return userData;}else {AfxMessageBox(L"error");}}else {AfxMessageBox(L"error");}// 如果读取失败，返回默认构造的UserDatareturn UserData();
}