Re: [boost] Re: C++ Standard Library proposal - Math functions forStatistics

From: Ross Smith (r-smith_at_[hidden])
Date: 2003-04-16 15:10:48

On Thursday, 17 April 2003 02:29, Hubert Holin wrote:
>
>       Then perhaps cbrt and pow (though I would like to know the
> precise C99 wording to see what people expect from them, say as to
> the range of the integer exponent for pow or the behaviour of cbrt on
> negative reals (that ought to be obvious, but then again...)).

| 7.12.7.1 The cbrt functions
| Synopsis
|     #include <math.h>
|     double cbrt(double x);
|     float cbrtf(float x);
|     long double cbrtl(long double x);
| Description
| The cbrt functions compute the real cube root of x.
| Returns
|                            1/3
| The cbrt functions return x   .

| 7.12.7.4 The pow functions
| Synopsis
|     #include <math.h>
|     double pow(double x, double y);
|     float powf(float x, float y);
|     long double powl(long double x, long double y);
| Description
| The pow functions compute x raised to the power y. A domain error
| occurs if x is finite and negative and y is finite and not an
| integer value. A domain error may occur if x is zero and y is less
| than or equal to zero. A range error may occur.
| Returns
|                           y
| The pow functions return x .

C99 has no separate integer-exponent version of pow(), that one is 
purely a C++ artifact.

-- 
Ross Smith ......... r-smith_at_[hidden] ......... Auckland, New Zealand
    Our landscape raped by different armies
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