Same Named Variable

#include<iostream>
using namespace std;
namespace A
{
int threshold;
}
namespace B
{
    int threshold;
}
using namespace A;
using namespace B;
int main()
{
    A::threshold = 50;
    B::threshold =75;
cout<<"A.threshold="<<A::threshold<<endl;
cout<<"B.threshold="<<B::threshold<<endl;
}