VMS Help CC, Language topics, Data Types, Structure *Conan The Librarian (sorry for the slow response - running on an old VAX) |
A structure is an aggregate of members whose data types can differ. Members can be scalar variables, arrays, structures, unions, and pointers to any object. The size of a structure is the sum of the sizes of its members, which are stored in the order of their declarations. Structures are defined with the keyword struct, followed by an optional tag, followed by a structure-declaration list in braces. The syntax is: struct [identifier] { struct-declaration ... } Each struct-declaration is a type specifier (type keyword, struct tag, union tag, enum tag, or typedef name) followed by a list of member declarators: type-specifier member-declarator,... ; Each member declarator defines either an ordinary variable or a bit field: declarator or [declarator] : constant-expression The following example declares a new structure employee with two structure variables bob and susan of the structure type employee: struct employee { char *name; int birthdate; /* name, birthdate, job_code, and salary are */ int job_code; /* treated as though declared with const. */ float salary; }; struct employee bob, susan;
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