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Type specifiers indicate the format of
the storage associated with a given data object or the return type
of a function. Syntax | |
type-specifier ::=
char
short
int
long
long long
unsigned
signed
float
double
void
struct-or-union-specifier
enum-specifier
typedef-name |
Description | |
Most of the type specifiers are single keywords. (Refer to
Chapter 10 “HP C/HP-UX Implementation
Topics ” for sizes of
types.) The syntax of the type specifiers permits more types than
are actually allowed in the C language. The various combinations
of type specifiers that are allowed are shown in Table 3-1 “C Type Specifiers ”. Type specifiers that are equivalent appear
together in a box. For example, specifying unsigned
is equivalent to unsigned int.
Type specifiers may appear in any order, possibly intermixed with
other declaration specifiers. Table 3-1 C Type Specifiers void | char | signed char | unsigned char | short,
signed short, short int,
or signed short int | unsigned short,
or unsigned short int | int,
signed, signed int,
or no type specifiers | unsigned,
or unsigned int | long,
signed long, long int,
or signed long int | long long,
signed long long, long long int,
or signed long long int | unsigned long,
or unsigned long int | unsigned long long,
or unsigned long long int | float | double | long double | struct-or-union specifier | enum-specifier | typedef-name |
If no type specifier is provided in a declaration, the default
type is int. Floating-point types in C are float
(32 bits), double
(64 bits), and long double
(128 bits). |
