object - variables declaration with same name C++

Question

Is this allowed?

Class A{
...
...
};

A a; //Global object

int main()
{
   A a; // Local object
   .
   .
   .
   .
   return 0;
}

Here a global object has been declared after the class definition, but also a local variable has been declared. Is it ok? Why?

Answer 1

It's perfectly legal to "hide" the declaration of an object, with another declaration in tighter scope. Within your main function, a will refer to the local variable. Outside the main function, a will refer to the global variable.

As to whether it's "ok" - I would say "no". It's a bad idea, in that it's likely to make your code confusing, and more prone to accidentally introducing bugs. I wouldn't advise doing it.