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Hi all,
I found some people writing code as:
/****************** sample code ********************/
int ans;
...
printf("%c\n", " yn"[ans]);
/***************** sample code end *****************/

The value of variable "ans" will be an index to print ' ', 'y' or
'n'. Is this a syntax " yn"[ans] in standard C?

ccwork wrote:

> Hi all,
> I found some people writing code as:
> /****************** sample code ********************/
> int ans;
> ...
> printf("%c\n", " yn"[ans]);
> /***************** sample code end *****************/
>
> The value of variable "ans" will be an index to print ' ', 'y' or
> 'n'. Is this a syntax " yn"[ans] in standard C?

Yes. It's just array indexing.

--
Chris "electric hedgehog" Dollin

"ccwork" <> wrote in message
news: oups.com...
> Hi all,
> I found some people writing code as:
> /****************** sample code ********************/
> int ans;
> ...
> printf("%c\n", " yn"[ans]);
> /***************** sample code end *****************/
>
> The value of variable "ans" will be an index to print ' ', 'y' or
> 'n'. Is this a syntax " yn"[ans] in standard C?

yes

ccwork wrote:

>Hi all,
> I found some people writing code as:
> /****************** sample code ********************/
> int ans;
> ...
> printf("%c\n", " yn"[ans]);
> /***************** sample code end *****************/
>
> The value of variable "ans" will be an index to print ' ', 'y' or
>'n'. Is this a syntax " yn"[ans] in standard C?
>
>
>
yes, even ans["yes"] is valid too.

Krishanu

On 2005-02-28 04:18:15 -0500, "ccwork" <> said:

> Hi all,
> I found some people writing code as:
> /****************** sample code ********************/
> int ans;
> ...
> printf("%c\n", " yn"[ans]);
> /***************** sample code end *****************/
>
> The value of variable "ans" will be an index to print ' ', 'y' or
> 'n'. Is this a syntax " yn"[ans] in standard C?

Yes. This might make more sense to you, if you consider that (" yn") is
nothing more than an array of characters. Your sample code is similar
to:

int ans;
const char array[] = " yn";
...
printf("%c\n", array[ans]);

--
Clark S. Cox, III

Hi all,
Thanks for all

Clark S. Cox III wrote:
> On 2005-02-28 04:18:15 -0500, "ccwork" <> said:
>
> > Hi all,
> > I found some people writing code as:
> > /****************** sample code ********************/
> > int ans;
> > ...
> > printf("%c\n", " yn"[ans]);
> > /***************** sample code end *****************/
> >
> > The value of variable "ans" will be an index to print ' ', 'y'
or
> > 'n'. Is this a syntax " yn"[ans] in standard C?
>
> Yes. This might make more sense to you, if you consider that (" yn")
is
> nothing more than an array of characters. Your sample code is similar

> to:
>
> int ans;
> const char array[] = " yn";
> ...
> printf("%c\n", array[ans]);
>
> --
> Clark S. Cox, III
>