Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!wuarchive!texbell!uhnix1!csune.cs.uh.edu!jsmng
From: jsmng@csune.cs.uh.edu
Newsgroups: comp.lang.c
Subject: scanf doesn't work for variables of type double
Message-ID: <12988@uhnix1.uh.edu>
Date: 15 Sep 89 00:58:35 GMT
Sender: nntppost@uhnix1.uh.edu
Reply-To: jsmng@csune.cs.uh.edu ()
Organization: University of Houston
Lines: 20

I used the following program trying to read in 5 numbers interactively.
As a test, I typed in 1.0 1.0 1.0 1.0 1.0 as input but the output is
about 0.47 (approximately I forget the exact value but it is far from 1).
When I changed the type of vec[] to be float. Everything is fine.
Does anyone have any experience with this? According to K&R, %f for
double should be allowed in scanf. We are running SunOS 4.0.1 and
I think our C compiler follows the K&R standards (as opposed to
ANSI).

#include <stdio.h>
#define V 5
main()
{
  double vec[V];
  int i;
  for (i=0;i<V;i++)
    scanf("%f ",&vec[i]);
  for (i=0;i<V;i++)
    printf("%f ",vec[i]);
}