Topic       : C-Language Documentation
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View Ref-File[ typedef ]

Defines a new data type, <name>.  Syntax:

  typedef <type> <name>;
  typedef <definition> <name>;

where <name> is the new type name, <type> is an existing data type
(including structures, unions, and enums), and <definition> is a union,
struct or enum definition.

<name> can now be used for variable and function definitions and for
casting.

Examples:

  typedef unsigned short WORD;       /* creates 'WORD' type */

  typedef union obspecptr OBS;       /* obspecptr from AES.H */

  typedef struct {
    int error;
    char *message;
   } ERR_MSG;                       /* creates 'ERR_MSG' type */

See also Names, Data Types, Structures and Unions.