MODF(3M) Mathematical Library Functions MODF(3M)
NAME
modf, modff, modfl - decompose floating-point number
SYNOPSIS
c99 [
flag... ]
file...
-lm [
library... ]
#include <math.h>
double modf(
double x,
double *iptr);
float modff(
float x,
float *iptr);
long double modfl(
long double x,
long double *iptr);
DESCRIPTION
These functions break the argument
x into integral and fractional
parts, each of which has the same sign as the argument. It stores the
integral part as a
double for the
modf() function, a float for the
modff() function, or a long double for the
modfl() function in the
object pointed to by
iptr.
RETURN VALUES
Upon successful completion, these functions return the signed
fractional part of
x.
If
x is NaN, a NaN is returned and *
iptr is set to NaN.
If
x is +-Inf, +-0 is returned and *
iptr is set to +-Inf.
ERRORS
No errors are defined.
USAGE
These functions compute the function result and *
iptr such that:
a = modf(x, &iptr) ;
x == a+*iptr ;
ATTRIBUTES
See
attributes(7) for descriptions of the following attributes:
+----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+----------------------------+-----------------------------+
|Interface Stability | Standard |
+----------------------------+-----------------------------+
|MT-Level | MT-Safe |
+----------------------------+-----------------------------+
SEE ALSO
frexp(3M),
isnan(3M),
ldexp(3M),
attributes(7),
standards(7)SunOS 5.11 June 20, 2021 MODF(3M)
