HP C/iX Reference Manual (31506-90011)
32 Chapter3
Data Types and Declarations
Type Specifiers
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).
double
long double
struct-or-union specifier
enum-specifier
typedef-name
Table 3-1. C Type Specifiers