Paul D. Anderson:
> I created a struct, call it "S", and some functions that operate on S. But
> I'm confused about when const is useful.
>
> Being an old Java programmer, I use 'const' the same as I used 'final' in
> Java. So most of my functions look like this:
>
> S for(const S a, const S b) {
> S x = a;
> S y = b;
> // do some stuff
> return a;
> }
>
> I declare the parameters const and then copy them to work on them.
>
> I get error messages about not implicitly casting const S to S.
This program compiles:
struct S { int x; }
S foo(const S a) {
S other = a;
return other;
}
void main() {}
So, what's that you actually write? When possible show programs that run! It's
one of the things I have learnt from the Python groups.
Bye,
bearophile
