Multiple ChoiceBeginner 45s
operator<< as friend vs member
Why is `operator<<` for streams usually implemented as a non-member (often friend) function?
Options
- 1Because the left operand is the stream (std::ostream&), not your class, so it cannot be a member of your class.
- 2Because member operators cannot be overloaded for any operator that takes two arguments.
- 3Because friend functions are always faster than member functions due to inlining rules.
- 4Because operator<< is required by the standard to be a static member of the stream class.
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