printf prints WRONG double precision values

[Ugen]

Try this:

#include <stdio.h>
int main()
{
double pi = 3.14159265358979323846 ;

        printf("%20.19f\n", pi);
}

and here is what you get:
host: [16:45] [127] /tmp>./test
3.1415926535897931160

 The error in last 4 or digits is obvious. It seems
that the culprit is __dtoa which incorrectly turns
double precision numbers into strings.
This is on FreeBSD 4.3 release..

Ideas?
--Ugen


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