Question

Which of the following operator cannot be used to overload when that function is declared as friend function?

(a) -=

(b) ||

(c) ==

(d) []

This question was posed to me during an interview.

This key question is from Operator Overloading in chapter Source Files, Classes and Operator Overloading in C++ of C++

Answer 1

Correct choice is (d) []

For explanation: When an operator overlaoded function is declared as friend function then [] cannot be overloaded.