On Sat, May 21, 2022 at 09:56:16AM +0300, Dan Carpenter wrote:
> On Fri, May 20, 2022 at 05:25:56PM +0200, Daniel Lezcano wrote:
> > On 20/05/2022 17:02, Dan Carpenter wrote:
> > > This while loop exits with "i" set to -1 and so then it sets:
> >
> > Won't it exit with 'i' set to '0' ?
> >
>
> Wow. You made me worried there. I had to make a test case just to be
> sure:
>
> int i = 10;
>
> while (i--)
> printf("in %d\n", i);
> printf("out %d\n", i);
>
> Yep. Ends on on -1.
I wrote a blog about this a few days back.
https://staticthinking.wordpress.com/2022/05/17/i-or-i/
I really think the most readable way is to say:
while (--i >= 0)
derived_table[i] = derived_table[i + 1] - 300;
Some people like while (i--) because it works on unsigned variables but
that doesn't apply here and "unsigned int i;" is dumb.
regards,
dan carpenter
