FREXP
NAME SYNOPSIS DESCRIPTION RETURN VALUE CONFORMING TO SEE ALSO
frexp - convert floating-point number to fractional and integral components
#include x, int *exp);
The frexp() function is used to split the number x into a normalized fraction and an exponent which is stored in exp.
The frexp() function returns the normalized fraction. If the argument x is not zero, the normalized fraction is x times a power of two, and is always in the range 1/2 (inclusive) to 1 (exclusive). If x is zero, then the normalized fraction is zero and zero is stored in exp.
SVID 3, POSIX, BSD 4.3, ISO 9899