Chapter 5
1 In C++, we have member functions and non-member functions. When we call member function as method we can refer non-member function simply as function.
2 It is a compulsory syntax requirement.
3 Henceforth we will use the term method for member functions.
4 Standard rule. Just as a variable has to be declared before use, data type is also required to be declared before use.
5 In such a case, we have to call the suitable method of the class if one exists.
6 This is not a syntax rule. If a function has nothing to do with class objects, it need not be present in that class definition.
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