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home | helpFREXP(3) BSD Library Functions Manual FREXP(3) NAME frexp -- 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); DESCRIPTION The frexp() function breaks a floating-point number into a normalized fraction and an integral power of 2. It stores the integer in the int object pointed to by exp. RETURN VALUES The frexp() function returns the value x, such that x is a double with magnitude 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() function conforms to ANSI X3.159-1989 ("ANSI C89"). BSD March 21, 2006 BSD
NAME | LIBRARY | SYNOPSIS | DESCRIPTION | RETURN VALUES | SEE ALSO | STANDARDS