Hi there,
the following little program
#include <stdio.h>
int main() {
double d;
scanf("%lf", &d);
printf("%.1000g\n", d);
return 0;
}
does this on Linux/i686
$ gcc -W -Wall in.c
$ a.out
70.9
70.900000000000005684341886080801486968994140625
and does the following under Cygwin on the same machine:
[EMAIL PROTECTED] /tmp
$ gcc -W -Wall in.c
[EMAIL PROTECTED] /tmp
$ ./a.exe
70.9
70.90000000000000568434188608080148696899414
Why? Is there a way to reconcile the two behaviors?
Notice that I know about the x87 and its vaguaries:
nonetheless I wonder why such a scanf immediately
followed by a printf shows a difference between
Cygwin and Linux.
All the best,
Roberto
--
Prof. Roberto Bagnara
Computer Science Group
Department of Mathematics, University of Parma, Italy
http://www.cs.unipr.it/~bagnara/
mailto:[EMAIL PROTECTED]
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