What will the following program display?
#include
using namespace std;
void other();
namespace n1
{
int x = 1;
}
namespace n2
{
int x = 2;
}
int main()
{
using namespace n1;
cout << x << endl;
{

int x = 4;
cout << x << ", " << n1::x << ", " << n2::x << endl;
}
using n2::x;
cout << x << endl;
other();
return 0;
}
void other()
{
using namespace n2;
cout << x << endl;
{
int x = 4;
cout << x << ", " << n1::x << ", " << n2::x << endl;
}
using n2::x;
cout << x << endl;
}