Discussion
In C++/C operators such as............ cannot be overloaded.
Answer: C
The operator that cannot be overloaded is ::, the scope resolution operator.
C++ allows most operators to be given new meanings for user-defined types, but a few are fixed by the language: the scope resolution operator ::, the member access operator ., the pointer-to-member operator .*, the conditional operator ?: and sizeof. These work on names and types at compile time rather than on values, so overloading them would make the language ambiguous.
The other options, +, ++ and ==, are among the operators most commonly overloaded, for example to add, increment or compare objects of a class.
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