Postfix Operators
The postfix operators have the highest precedence (the tightest binding) in expression evaluation.
Syntax
postfix-expression:
primary-expression
postfix-expression [ expression ]
postfix-expression ( argument-expression-listopt )
postfix-expression . identifier
postfix-expression -> identifier
postfix-expression ++
postfix-expression --
Operators in this precedence level are the array subscripts, function calls, structure and union members, and postfix increment and decrement operators.