Overloading the ifstream operator >>

I am writing a program and am attempting to overload the ifstream operator >>. I have done it in this form:

ifstream & operator >> (ifstream & infield, Class_name & cclass)

where i pass a class type as the second parameter.
However, for what I am doing this time, I only need to pass it a string but I have a friend who has had trouble with this before while trying to pass a pointer. Will it work in either of these ways:

ifstream & operator >> (ifstream & infield, string & instring)

or

ifstream & operator>>(ifstream & infield, string instring).

If neither of these will work, please tell me the correct syntax for passing it a string instead of a class as the second parameter.

Thank you.
Orpheus
orpheusAsked:
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strobertCommented:
the first one:
ifstream & operator >> (ifstream & infield, string & instring)

string is a class, but even with a base type like int, just have the second arg be a ref to the type you want to instream.
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orpheusAuthor Commented:
thanks, ill give it a try.
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