Expressions with Unary Operators

Unary operators act on only one operand in an expression. The unary operators are:

• Indirection operator (*)
  
  
• Address-of operator (&)
  
  
• Unary plus operator (+)
  
  
• Unary negation operator (–)
  
  
• Logical NOT operator (!)
  
  
• One’s complement operator (~)
  
  
• Prefix increment operator (++)
  
  
• Prefix decrement operator (––)
  
  
• sizeof operator
  
  
• new operator
  
  
• delete operator

These operators have right-to-left associativity.

Syntax

unary-expression :

postfix-expression
++unary-expression
––unary-expression
unary-operator cast-expression
sizeof .unary-expression
sizeof ( type-name )
allocation-expression
deallocation-expression

unary-operator : one of

* & + – ! ~