I need some math whiz help. So it seems to me that strtod("NAN",
NULL) should return the same as __builtin_nan(""). And G++ should
return the same result as GCC. For the GCC instance I believe that
the crt/gdtoa/strtodnrp.c code is wrong. For the G++ instance I
believe stdlib.h isn't correct. Can someone help me debug the
strtodnrp.c issue?
// -----nan-test.c-----
#include <math.h>
#include <stdlib.h>
#include <stdio.h>
int main()
{
char *endp;
printf("strtod(NAN) = %f, nan('') = %f\n", strtod("NAN", &endp),
__builtin_nan(""));
return 0;
}
-// --end nan-test.c---
$ gcc -o nan-test nan-test.c
$ ./nan-test
strtod(NAN) = -1.#IND00, nan('') = 1.#QNAN0
$ g++ -o nan-test nan-test.C
$ ./nan-test
strtod(NAN) = 0.000000, nan('') = 1.#QNAN0
--
Earnie
-- https://sites.google.com/site/earnieboyd
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