Re: on allowing "int a" definition everywhere

On 23/08/2024 11:47, fir wrote:

Bart wrote:

 btw maybe not so much relevent as what you write but
if to think the convention
  foir(int i=0; i<100; i++)
{
   //,,,
}
 to amke int i scope relevant to only inner of the loop seem just logically wrong

Actually it's one of the few places it makes sense!
But I don't like this idiom for several reasons. Sure, it can be convenient to write:
  for(int i=0; i<100; i++)
without having to make an annoying detour to the top of the function to write that declaration for i. But then you need a second loop, and a third, and how you have to repeat a declaration each time:
  for(int i=0; i<200; i++)
Better to do it once and forget about it.
Then, it allows nested loops like this:
  for (int i = 0; i<A; ++i)
      for (int i = 0; i<B; ++i)
          for (int i = 0; i<C; ++i)
All those i's are different! Only the last is accessible in the inner loop.