Re: [avr-gcc-list] OT Generic C question

[Alexandru Csete]

On 9/20/05, Trampas <address@hidden> wrote:
> I was helping a friend debug some code, he is new to C,  using the Keil
> version of GCC for ARM. Anyway I found the following:
>
> int i;
>
> i=0;
> i=i++;
> //i was still zero that
>

i=i++ is somehow ambigous.
The statement i++ means "use the value of i then increment it", while
++i means "increment i then use the value". Thus, there is no need to
write i=i++. Use:

i++;
or
++i;
or
i = i+1;

> That is i=i++ never incremented i, now I would have thought the line would
> be the same as:
>
> i=i;
> i=i+1;
>
> So you guys are the smartest people I know when it comes to C so I thought I
> would ask you guys if this is a compiler bug or is my understanding of C
> just been shaken.
>
> Regards,
> Trampas
>

Alex