[Mingw-notify] [ mingw-Bugs-893402 ] hexadecimal floating-point constants

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Bugs item #893402, was opened at 2004-02-10 02:57
Message generated for change (Comment added) made by dannysmith
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>Category: gcc
Group: None
>Status: Closed
>Resolution: Fixed
Priority: 5
Submitted By: Darrin Forelle (darrinf)
Assigned to: Danny Smith (dannysmith)
Summary: hexadecimal floating-point constants

Initial Comment:
1.c:
#include <stdio.h>

int main(void){
 return printf("2.228e-05 = %g\n", (double) 
0X1.75CBDF111D08CF5CP-16l);
}

gcc 1.c -o 1.exe & 1
2.228e-05 = 0

Tested with gcc v3.3.1 (mingw special 20030804-1).

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>Comment By: Danny Smith (dannysmith)
Date: 2004-02-12 09:03

Message:
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user_id=11494

Fixed in GCC CVS.  The problem was with uppercase 'X'.

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Comment By: Danny Smith (dannysmith)
Date: 2004-02-10 11:44

Message:
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Sorry, my earlier comments were completely wrong.  It has  
nothing to do with printf.  GCC doesn't like uppercase in 
hexdec fp constants.

This works:

#include <stdio.h>

int main(void){
   return printf("2.228e-05 = %g\n", (double) 
                     0x1.75cbdf111d08cf5cp-16l);
}


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Comment By: Danny Smith (dannysmith)
Date: 2004-02-10 11:04

Message:
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user_id=11494

The printf supplied by the MSVC runtime is not C99 compliant 
and does not support headecimal FP constants. Nor does 
strtod.  Sorry.

Danny

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