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When enabling a class to work with iostreams by adding overloaded    operator<< and operator>> functions, should...

When enabling a class to work with iostreams by adding overloaded

   operator<< and operator>> functions, should they be friends

   of the class or member functions, and why?

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Answer #1

`Hey,

Note: Brother if you have any queries related the answer please do comment. I would be very happy to resolve all your queries.

The stream operators:

  • operator << output
  • operator >> input

When you use these as stream operators (rather than binary shift) the first parameter is a stream. Since you do not have access to the stream object (its not yours to modify) these can not be member operators they have to be external to the class. Thus they must either be friends of the class or have access to a public method that will do the streaming for you.

It is also traditional for these objects to return a reference to a stream object so you can chain stream operations together.

Kindly revert for any queries

Thanks.

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