double_t
Section: Misc. Reference Manual Pages (3type)
Updated: 2022-12-15
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NAME
float_t, double_t - most efficient floating types
LIBRARY
Math library
(libm)
SYNOPSIS
#include <math.h>
typedef /* ... */ float_t;
typedef /* ... */ double_t;
DESCRIPTION
The implementation's most efficient floating types at least as wide as
float
and
double
respectively.
Their type depends on the value of the macro
FLT_EVAL_METHOD
(defined in
<float.h>):
| FLT_EVAL_METHOD | float_t | double_t
|
|
| 0 | float | double
|
| 1 | double | double
|
| 2 | long double | long double
|
For other values of
FLT_EVAL_METHOD,
the types of
float_t
and
double_t
are implementation-defined.
STANDARDS
C99 and later; POSIX.1-2001 and later.
SEE ALSO
float.h(0p),
math.h(0p)
Index
- NAME
-
- LIBRARY
-
- SYNOPSIS
-
- DESCRIPTION
-
- STANDARDS
-
- SEE ALSO
-
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