// Assuming msg is a MessageIn object std::string str = msg.readString(); std::cout << "Read string: " << str << std::endl;
// Assuming msg is a MessageIn object and maxLength is an integer std::string str = msg.readString(maxLength); std::cout << "Read string (max length " << maxLength << "): " << str << std::endl;This code reads a string from the input stream with the specified maximum length and prints it to the console. If the input stream contains more characters than maxLength, only the first maxLength characters will be read. Based on the code examples, it can be determined that the package/library being used is the cpp netlib MessageIn.