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frexp ? convert floating-point number to fractional and integral components |
#include <math.h> double frexp(double 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 |
ldexp(3), modf(3) |