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Re: extern array as a pointer

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On 12/07/2016 11:06, sinbad wrote:
>
> Hi,
>
> 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.
>
>  1 #include "stdio.h"
>   2
>   3 int foo();
>   4
>   5 int array[5];
>   6
>   7 int main()
>   8 {
>   9    foo();
>  10    printf("array[0] is %u", array[0]);
>  11    return(0);
>  12 }
>  13
>  14 foo.c:
>  15
>  16 extern int *array;
>  17
>  18 int foo()
>  19 {
>  20   arr[0]= 10;

Did you mean array[0] here?

>  21   return(0);
>  22 }
>
>

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. Try writing:

extern int array[];

in foo.c

-- 
Bartc

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Thread

extern array as a pointer sinbad <sinbad.sinbad@gmail.com> - 2016-07-12 03:06 -0700
  Re: extern array as a pointer BartC <bc@freeuk.com> - 2016-07-12 11:45 +0100
    Re: extern array as a pointer Frank Tetzel <s1445051@mail.zih.tu-dresden.de> - 2016-07-12 13:58 +0200
      Re: extern array as a pointer Ben Bacarisse <ben.usenet@bsb.me.uk> - 2016-07-12 13:33 +0100
      Re: extern array as a pointer Keith Thompson <kst-u@mib.org> - 2016-07-12 09:30 -0700
        Re: extern array as a pointer James Kuyper <jameskuyper@verizon.net> - 2016-07-12 12:52 -0400
          Re: extern array as a pointer Keith Thompson <kst-u@mib.org> - 2016-07-12 11:30 -0700
            Re: extern array as a pointer supercat@casperkitty.com - 2016-07-12 11:51 -0700
        Re: extern array as a pointer supercat@casperkitty.com - 2016-07-12 10:55 -0700
    Re: extern array as a pointer Keith Thompson <kst-u@mib.org> - 2016-07-12 09:28 -0700
  Re: extern array as a pointer Nobody <nobody@nowhere.invalid> - 2016-07-12 13:26 +0100
    Re: extern array as a pointer Keith Thompson <kst-u@mib.org> - 2016-07-12 09:26 -0700
  Re: extern array as a pointer Richard Heathfield <rjh@cpax.org.uk> - 2016-07-12 13:46 +0100
  Re: extern array as a pointer James Kuyper <jameskuyper@verizon.net> - 2016-07-12 12:33 -0400

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