When a member function is defined outside of the class declaration, the function name must be qualified with thewhen a member function is defined outside of the class declaration, the function name must be qualified with

class name, followed by the scope resolution operator

Explanation:

The scope resolution operator helps to identify and specify the context to which an identifier refers, particularly by specifying a namespace.

Therefore, when a member function is defined outside of the class declaration, the function name must be qualified with the class name, followed by the scope resolution operator

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