Syntax

postfix-expression . identifier

postfix-expression must be of type union or structure. 

identifier must be the name of a member of that structure or union type. 

Remarks 

Use the selection operator (.) to access structure and union members. 

Suppose that the object s is of struct type S and sptr is a pointer to S. Then, if m is a member identifier of type M declared in S, this expression:

s.m

are of type M, and represent the member object m in s.