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C PUZZLE!


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purplepolka_81 Posted: Tue Jul 29, 2003 11:54 pm


Joined: 29 Jul 2003

Posts: 1
C PUZZLE!
Hi all,
 
how does this pgm work??
 
voidf(char *)main(){f("123");}voidf(char a[]){if(a[1] == ``) return ;f(a+1);f(a+1);printf("%c",a[1]);}
 
cheers,
P
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shantanu_k06 Posted: Wed Jul 30, 2003 10:04 pm


Joined: 19 Jul 2003

Posts: 29
C PUZZLE!
Do a dry-run and you`ll get the answer as well as
understand how it works. It uses recursion, in case
you didn`t know that.

BTW, does it produce an output "22221"? I did a quick
dry-run just now (and used little bit speculation :-).
I might be wrong too.

Regards,
Shantanu

--- polka dot <purplepolka_81@...> wrote:
> Hi all,
>
> how does this pgm work??
>
> voidf(char *)
> main()
> {
> f("123");
> }
> voidf(char a[])
> {
> if(a[1] == ``) return ;
> f(a+1);
> f(a+1);
> printf("%c",a[1]);
> }
>
> cheers,
> P


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