#includeIn this example, we create a StringBuffer object with the initial value "Hello, world!". Then, we call the GetSize method to get the current size of the buffer and print it to the console. Overall, the StringBuffer class and its methods are useful when working with string manipulation and memory management. The package library used may vary and it depends on the specific project and requirements.// assuming stdcxx library is used void foo() { StringBuffer buf("Hello, world!"); // create a StringBuffer object with initial value int size = buf.GetSize(); // get the current size of the buffer std::cout << "The size of the buffer is: " << size << std::endl; }