Transcription: If a member function is defined outside the class, you must declare the member function inside the class. Notice the class name, weather, followed by the scope resolution operator in the definition of the function, redo it. This is the syntax for indicating that this function is a member of the class, weather. Defining member functions outside the class is often a good idea, especially if the function body is large. Programmers using your class, then see only the interface in the class definition.