C struct, typedef, enum & union - Tenouk C & C++

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STRUCT, TYPEDEF, ENUM & UNIONAccessing the Structure Member• A "member-selection expression" refers tomembers of structures (and unions, classes).• Such an expression has the value and type of theselected member.• The member access operators . (dot) and ->(arrow: minus + greater than symbols) are usedto refer to members of structures (also unionsand classes).• Member access expressions have the value andtype of the selected member.• There are two methods that can be used toaccess the members using dot or an arrowoperator.www.tenouk.com, © 22/93
STRUCT, TYPEDEF, ENUM & UNION• The two syntaxes are,1. postfix-expression. Identifier2. postfix-expression –> identifier• In the first form, postfix-expression represents a value ofstruct (or union, class object) type and identifier names amember of the specified structure (or union, class object).• The value of the operation is that of identifier and is an leftvalueif postfix-expression is an left-value.• In the second form, postfix-expression represents a pointerto a structure or union, and identifier names a member ofthe specified structure or union.• The value is that of identifier and is an left-value.• The two forms of member-selection expressions have similareffects.www.tenouk.com, © 23/93
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C struct, typedef, enum & union - Tenouk C & C++

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