Functions

Abstract

In all the previous examples, we have implemented the behaviour of objects by writing member functions. Such functions have then been invoked or called by statements such as

initialise () ;

or for instances of an object by statements such as

history.test_first_class_mark () ;

In such cases, the function call exists as an executable statement with no arguments. The effect of the call is to cause the statements of the function to be executed; when completed, the calling function or program continues from the next statement.