simpleNamespace.cpp

#include <iostream>

//define a namespace called ns1
namespace ns1
{
    void f() {
        std::cout << "ns1 function f" << std::endl;
    }
}


//define a namespace called ns2
namespace ns2 
{
    void f() {
        std::cout << "ns2 function f" << std::endl;
    }
}


int main() 
{
    //call our functions within the two namespaces
    ns1::f();
    ns2::f();

    return 0;
}