Overloading >> Error C++ [closed]

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开发者_运维技巧

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Closed 9 years ago.

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Whenever I try to compile my program, I get a strange error. I have tried to look it up, and trying different methods of overloading it, but I still get errors.

istream& operator >> ( istream& in, MysteryCard& theMysteryCard ) 
{
  int value;
  in >> value;
theMysteryCard.change(value);
  return in;
}

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All of my variables are right, and the functions work, but I do not know why it isn't working.

13 no match for 'operator>>' in 'in >> value'

The change function is public as well.

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It appears to me that you're missing an include. Make sure you have #include <istream> and that you have either a using declaration for std::istream or a using directive for namespace std.