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frexp(3) [v7 man page]

FREXP(3)						     Library Functions Manual							  FREXP(3)

frexp, ldexp, modf - split into mantissa and exponent SYNOPSIS
double frexp(value, eptr) double value; int *eptr; double ldexp(value, exp) double value; double modf(value, iptr) double value, *iptr; DESCRIPTION
Frexp returns the mantissa of a double value as a double quantity, x, of magnitude less than 1 and stores an integer n such that value = x*2**n indirectly through eptr. Ldexp returns the quantity value*2**exp. Modf returns the positive fractional part of value and stores the integer part indirectly through iptr. FREXP(3)

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modf(3M)						  Mathematical Library Functions						  modf(3M)

modf, modff, modfl - decompose floating-point number SYNOPSIS
cc [ 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 themodfl() 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(5) 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(5), standards(5) SunOS 5.10 16 Aug 2004 modf(3M)
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