Almost all operators can be overloaded, including:

1. All the arithmetic, logical, comparison, equality, assignment, and bit operators. In addition, the autoincrement and autodecrement operators (++ and --) can have distinct prefix and postfix meanings.
2. The subscript or index operator [] and the function call ().
3. The class pointer operator (->) and the member pointer selector operator (->*).
4. The operators new and delete.

The assignment, function call, subscripting, and class pointer operators can be overloaded only by nonstatic member functions.

The following operators cannot be overloaded:

1. the member operator (.)
2. the member object selector operator (.*)
3. the ternary conditional expression operator (?:)
4. the sizeof operator
5. the scope resolution operator (::)

Click the Quiz link below to take a brief multiple-choice quiz on which operator can be overloaded.
Operator Overloading Quiz