Originální popis anglicky:
log1p - logarithm of 1 plus argument
Návod, kniha: Linux Programmer's Manual
#include <math.h>
double log1p(double x);
float log1pf(float x);
long double log1pl(long double x);
Link with -lm.
log1p(x) returns a value equivalent to `log (1 +
x)'. It is computed in a way that is accurate even if the value of
x is near zero.
BSD, C99. The float and the long double variants are C99 requirements.
exp(3),
expm1(3),
log(3)
