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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
_Bool
_Complex
_Imaginary
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 | _Bool | float_Complex | double_Complex | long double_Complex | float_Imaginary | double_Imaginary | long double_Imaginary | 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). |
