Operators are tokens that trigger some computation when applied to variables and other objects in an expression. 

Arithmetic 

Assignment 

Bitwise 

C++ specific 

Comma 

Conditional 

Equality 

Logical 

Postfix Expression Operators 

Primary Expression Operators 

Preprocessor 

Reference/Indirect operators 

Relational 

sizeof 

typeid 

All operators can be overloaded except the following:

• . C++ direct component selector
• .* C++ dereference
• :: C++ scope access/resolution
• ?: Conditional

Depending on context, the same operator can have more than one meaning. For example, the ampersand (&) can be interpreted as:

• a bitwise AND (A & B)
• an address operator (&A)
• in C++, a reference modifier