Methods and messages

Method is another name for C++ member functions.

Methods may be constructors, destructors, functions, and overloaded operators.

Methods define the class interface. (The constructor and overloaded plus operator in Listing 3 are methods.)

A message is the invocation of a method. In C++, this is the same thing as calling a public member function.

The program sends a message to an object telling it to execute the method.

Sometimes parameters are provided for the method to use.