std::string str = "Hello World!"; std::string substr = str.substr(6, 5); // substr = "World"
std::string str = "The quick brown fox"; std::string substr = str.substr(10); // substr = "brown fox"This example demonstrates that if we only provide the starting index, the length parameter is implicitly set to the end of the original string. Therefore, the returned substring starts at index 10 and continues until the end of the original string. The get function is part of the `std` namespace which is part of the C++ Standard Library. Therefore, no external library is necessary to use this function.