DragonFly On-Line Manual Pages


FREXP(3)	      DragonFly Library Functions Manual	      FREXP(3)

NAME

frexp, frexpf, frexpl -- convert floating-point number to fractional and integral components

LIBRARY

Math Library (libm, -lm)

SYNOPSIS

#include <math.h> double frexp(double value, int *exp); float frexpf(float value, int *exp); long double frexpl(long double value, int *exp);

DESCRIPTION

The frexp(), frexpf() and frexpl() functions break a floating-point num- ber into a normalized fraction and an integral power of 2. They store the integer in the int object pointed to by exp.

RETURN VALUES

These functions return the value x, such that x is a double with magni- tude in the interval [1/2, 1) or zero, and value equals x times 2 raised to the power *exp. If value is zero, both parts of the result are zero.

SEE ALSO

ldexp(3), math(3), modf(3)

STANDARDS

The frexp(), frexpf(), and frexpl() functions conform to ISO/IEC 9899:1999 (``ISO C99''). DragonFly 4.1 March 4, 2005 DragonFly 4.1