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UserData 	return UserData(); }