Re: Error in the "strcat" function

["Adelmo Silva" <adelmojs () hotmail com>]

But, if I wrote:
strcat(string1, &ips1[i]);

Another error happen:
teste1.c:294: error: incompatible types in assignment


Adelmo J. Silva





> From: Guy Harris <guy () alum mit edu>
> Reply-To: tcpdump-workers () lists tcpdump org
> To: tcpdump-workers () lists tcpdump org
> Subject: Re: [tcpdump-workers] Error in the "strcat" function
> Date: Fri, 02 Feb 2007 11:35:37 -0800
> MIME-Version: 1.0
>
>
>
> That means ips1[i] is a u_char, which is an (unsigned) integer.
>
> If you mean that you want to copy the text starting at the "i"th character 
> in ips1 (where the first character is the 0th character), you want to do
>
>         strcat(string1, &ips1[i]);
>
> because
>
> 	1) you want a *pointer* to the text starting at the "i"th character in 
> ips1
>
> and
>
> 	2) you can't assign anything to string1, as it's an array, not a pointer 
> (arrays are *NOT* pointers in C, although a reference to an array, in most 
> but *NOT* all contexts, is converted to a pointer to the element of the 
> array).
>
> Note also that string1 doesn't get any bigger, as an array, so if its 
> contents are "0123456789", ips1's contents are 
> "abcdefghijklmnopqrstuvwxyz", and i is 5, you will overflow the string1 
> array.
>
> (Note that none of this has anything to do with libpcap.)
> -
> This is the tcpdump-workers list.
> Visit https://cod.sandelman.ca/ to unsubscribe.

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