I would rather try to evaluate the size of the abstract syntax tree. I think this is more relevant since int main(){int a;} is obviously similar to int main(){int b;}
> How many non-alpha-equivalent C programs are there?
and then goes further:
> How many functionally inequivalent C programs are there?
The "this" you're refering to is itself refering to this last question.
I would rather try to evaluate the size of the abstract syntax tree. I think this is more relevant since int main(){int a;} is obviously similar to int main(){int b;}