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Difference between revisions of "Functions HI-TECH C FREXP"
From HI-TECH C for CP/M Fan WIKI(EN)
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Latest revision as of 19:58, 31 July 2017
FREXP, LDEXP
SYNOPSIS
#include <math.h> double frexp(double f, int * p) double ldexp(double f, int i)
DESCRIPTION
Frexp() breaks a floating point number into a normalized fraction and an integral power of 2. The integer is stored into the int object pointed to by p. Its return value x is in the interval [0.5, 1.0) or zero, and f equals x times 2 raised to the power stored in
- p. If f is zero, both parts of the result are zero.
Ldexp() performs the reverse operation; the integer i is added to the exponent of the floating point f and the resultant value returned.
