Operators and functions that are declared as members of a class are known as member functions. Operators and functions declared with the friend specifier are not included in member functions. These are known as class pals. A member function can be declared static; this is known as a static member function.
A member function can be defined within the body of the class in which it is declared. The full body of the function is defined within the class body. Outside of the class, a member function can be defined. The scope resolution operator is used to declare a function outside of the class.
A member function is called using the class object and is declared in the class but defined outside of it. A non-member function declared outside the class but referred to as a normal function inside the main function.
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