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From: Keith Thompson <kst-u@mib.org>
Newsgroups: comp.lang.c
Subject: Re: extern array as a pointer
Date: Tue, 12 Jul 2016 09:28:58 -0700
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BartC <bc@freeuk.com> writes:
> On 12/07/2016 11:06, sinbad wrote:
>> why does the following program crash at line# 20.
>> Is it even legal to define array as an integer
>> pointer while infact it's original definition is
>> single dimensional array or five elements.
[...]
>>   5 int array[5];
[...]
>>  16 extern int *array;
[...]
>
> You have a normal array in one module which is defined as a pointer to 
> array in another, assuming arr was meant to be array.

No, it's declared (not defined) as a pointer to int, not a pointer to an
array.  A pointer to an array would be something like
    extern int (*a)[];
or
    extern int (*a)[5];

>                                                       Try writing:
>
> extern int array[];

Yup.

-- 
Keith Thompson (The_Other_Keith) kst-u@mib.org  <http://www.ghoti.net/~kst>
Working, but not speaking, for JetHead Development, Inc.
"We must do something.  This is something.  Therefore, we must do this."
    -- Antony Jay and Jonathan Lynn, "Yes Minister"