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

[Bernard Fouché]

Trampas 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 
>
> That is i=i++ never incremented i, now I would have thought the line would
> be the same as:
>
> i=i;
> i=i+1; 
>
>
>  
i++ means 'get i value, afterwards increment it'. So

i=i++ will increment i, but after having read it to assign its value to 
itself :-)

The place where "++" is located is important. You may have wanted:

i=++i;   (this time 'i' is incremented before 'i' value is read)

but if the whole point is just to have 'i' incremented by one then

i++;              is enough

or

i+=1;


 Bernard