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C++ Language/ProgramFlow/Parameters/DefaultParameter

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C++ Language
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  13. Obsolete Features

When defining a function having a parameter, you can specify a default value that will be used if the caller doesn't provide a value for that parameter. For a member function, this should appear in the class definition as void DoMember(int aiParam = 123); (use ordinary syntax when implementing this function).

Additional information about default parameters (includes interactive examples)

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