Re: Problem with long double in MS VC++ v6.0 ?

From: Anthony Borla (ajborla_at_bigpond.com)
Date: 03/19/05 

Date: Sat, 19 Mar 2005 19:02:31 GMT

"spiatek " <spiatek@neostrada.pl > wrote in message
news:d1hrfs$oi4$1@nemesis.news.tpi.pl...
> I wrote such programme:
>
> long double A,B,C;
>
> A=2e-1;
> C=1e-17;
> B=A+C;
>
> if(A==B)
> {
> A=1;
> }
> else
> {
> B=1;
> }
>
> Why does computer still sees, that A == B?
> What do to make programme to calculate correctly?
> Maybe alter something in options VC++ ?
>

Try the following code:

#include <stdio.h>

int main(void)
{
    printf("sizeof double: %d\n", sizeof(double));
    printf("sizeof long double: %d\n", sizeof(long double));
    return 0;
}

If the sizes are the same then you have your answer :) !

Cheers,

Anthony Borla

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