GNU/Linux man pages
Livre :
Expressions régulières,
Syntaxe et mise en oeuvre :
GNU/Linux |
CentOS 5.3 |
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scalblnf(3) |
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scalb, scalbf, scalbl, scalbn, scalbnf, scalbnl, scalbln, scalblnf, scalblnl − multiply floating-point number by integral power of radix
#include <math.h>
double
scalb(double x, double exp);
float scalbf(float x, double
exp);
long double scalbl(long double x, double
exp);
double
scalbn(double x, int exp);
float scalbnf(float x, int exp);
long double scalbnl(long double x, int
exp);
double
scalbln(double x, long int exp);
float scalblnf(float x, long int
exp);
long double scalblnl(long double x, long
int exp);
Link with −lm.
These functions multiply their first argument x by FLT_RADIX (probably 2) to the power exp.
If FLT_RADIX equals 2, then scalbn() is equivalent to ldexp().
The value of FLT_RADIX is found in <float.h>.
The scalb() function is from 4.3BSD. The scalbn() and scalbln() functions are from C99. All three are in POSIX.1-2001. The scalb() function is marked obsolescent.
ldexp(3)
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scalblnf(3) | |