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double type bug? again
From: |
dryopithecus |
Subject: |
double type bug? again |
Date: |
Mon, 15 Sep 2003 13:02:28 +0200 |
Sorry!
I sent the note below, but I didn't mention that my version of glibc is 2.2.5,
inside a linux box with kernel 2.4.19
>Hello.
>I think I've found a bug related to the 'double' type. It seems that some
>decimal constants are considered too large by glibc to fit in a signed double,
>constants not really so high, but furthermore... if higher numbers than those
>are used, there's no claim!!
>
>Here is a little program for explanation. Below are the compiler warnings and
>the console output.
>
>----------------------------------------------------------------------------
>#include <stdio.h>
>#include <stdlib.h>
>
>/* main */
>int main (int argc, char *argv[])
>{
> double a, b, c, d;
>
> a = -2147483648;
> b = -2147483649;
> c = -4294967296;
> d = 4294967297;
>
> printf("%.0f\n", a);
> printf("%.0f\n", b);
> printf("%.0f\n", c);
> printf("%.0f\n", d);
>
> return 0;
>}
>
>------------------------------------------------------------------------------
>
>WARNINGS:
>test.c:9: warning: decimal constant is so large that it is unsigned
>test.c:10: warning: decimal constant is so large that it is unsigned
>
>------------------------------------------------------------------------------
>OUTPUT:
>2147483648
>2147483647
>-4294967296
>4294967297
>
>
>Hope this helps...
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