#includeIn the above example, we create a stringstream object with the initial value of "Hello World!". The clear() method is used to remove the contents of the string stream object. After clearing, the stream does not contain any values. The std::stringstream class is part of the standard library, and it is included in the `sstream` package.#include int main() { std::stringstream ss("Hello World!"); std::cout << "Before clearing - " << ss.str() << std::endl; ss.clear(); // clears the stream std::cout << "After clearing - " << ss.str() << std::endl; return 0; }