reference question! quick question, pls help

[albtross]

i have troubles understanding what is the difference between nonlocal reference and global reference, because by definition, they are both saying reference is accessible to local process but it's not created on entry.
so anyone can clarify it with examples plz help.

[teknomage1]

All global references are nonlocal but not all nonlocal references are global references.

[albtross]

Originally Posted by teknomage1

All global references are nonlocal but not all nonlocal references are global references.

ya, now i remember, thx. nonlocal is a bigger scope, like if we declare a variable in main, then we have a block structure code, and it can use that variable, however, it's neither local nor global to the blocks.

[Valmont]

Originally Posted by albtross

because by definition, they are both saying reference is accessible to local process but it's not created on entry.

Who is "they"?

This is the ISO section so here's an example within the scope of ISO C++.

#include <iostream>

using namespace std;


int main()
{
	int MyNumber = 5;
	{
		int MyNumber = MyNumber;
		MyNumber = 3;
		std::cout<<MyNumber<<endl;
	}
	std::cout<<MyNumber<<endl;

}

Output:
3
5

ISO C++ definition: 3.3, item 2

Note: a nonlocal name remains visible up to the point of declaration of the local name that hides it.