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struct | Keyword |
Keyword Index |
Groups variables into a single record.
The syntax for defining records is:
struct [struct-type-name] { [type variable-names] ; ... } [structure-variables] ;A struct, like an union, groups variables into a single record. The struct-type-name is an optional tag name that refers to the structure type. The structure-variables are the data definitions, and are also optional. Though both are optional, one of the two must appear.
struct my_struct { char name[80], phone_number[80]; int age, height; } my_friend;declares a record variable my_friend containing two strings (name and phone_number) and two integers (age and height). To declare additional variables of the same type, you use the keyword
struct
followed by the struct-type-name, followed by the variable names. For
example,
struct my_struct my_friends[100];declares an array named my_friends which components are records. In fact,
'struct my_struct'
becomes a new type which is equal in rights with any
built-in type.
'.'
). For
example,
strcpy (my_friend.name, "Mr. Wizard");A bit field is an element of a structure that is defined in terms of bits. Using a special type of struct definition, you can declare a structure element that can range from 1 to 16 bits in length. For example,
struct bit_field { int bit_1 : 1; int bits_2_to_5 : 4; int bit_6 : 1; int bits_7_to_16 : 10; } bit_var;