How to trim whitespace from beginning and end of std::string in C++?

Hello everyone! I'm a beginner C++ developer writing a simple program for processing user input. I need to remove extra whitespace (including tabs and newlines) from the beginning and end of a string. For example, the string " Hello, World! " should become "Hello, World!". I know that C++ has std::string, but I can't find a built-in method for trimming. I tried writing my own function using loops, but the code turns out cumbersome and inconvenient. Here's what I tried to do: ```cpp std::string trim(std::string str) { // Remove leading whitespace while (str[0] == ' ') { str.erase(0, 1); } // Remove trailing whitespace while (str[str.size() - 1] == ' ') { str.pop_back(); } return str; } ``` But this only works for s