C++ global and local variables

Question

I have encountered the following code:

#include
using namespace std;
int i = 1;
int main(int argc,char ** argv)
{
    int i = i;
    cout&l         


        

Answer 1

The int i = i; statement in main() declares a local variable that hides the global variable.

It initializes itself with itself (which has an indeterminate value). So the global i simply isn't used.

Answer 2

In C++, it is possible to access the global variable if you have a local variable with the same name but you have to use the scope resolution operator ::

change the line:

int i = i;

to

int i = ::i;

and the program will compile and work