// Example namespaces.cpp

// Show how to use namespaces to
// organize global variables.

#include <iostream>
using namespace std;

namespace a
{
    bool flag;
    int x;
}

namespace b
{
    bool flag;
    int x;
}

int main()
{
    a::flag = false;
    a::x = 3;
    b::flag = true;
    b::x = 4;
    cout << a::flag << " " << a::x << " " <<
        b::flag << " " << b::x << endl; 

    using namespace a;
    cout << flag << " " << x << endl;
    x += 3;
    cout << flag << " " << x << endl;

    b::x += 5;
    cout << b::x << endl;

    return EXIT_SUCCESS;
}