#includeIn this example, we create a string object `str1` with the value "Hello, world!". We then create a new string object `str2` by calling the `isolatedCopy` function on `str1`, passing in the starting index `2` and the length `5`. This creates a copy of the section of `str1` starting at index `2` (which is the first "l" in "Hello") and continuing for `5` characters, resulting in the string "llo, ". We then output this string to the console. This function is part of the C++ Standard Library.#include int main() { std::string str1 = "Hello, world!"; std::string str2 = str1.isolatedCopy(2, 5); // copies "llo, " std::cout << str2 << std::endl; return 0; }