C++ local variables with the same name

#include <iostream>
using namespace std;
get_age();  // Prototype
int main()/*from   w w  w.j a v a 2 s.c  o m*/
{
   int age;
   cout << "What is your age? ";
   cin >> age;
   get_age();                 // Call the second function.
   cout << "main()'s age is still " << age << "\n";
   return 0;
}
get_age()
{
   int age;                
   cout << "What is your age again? ";
   cin >> age;
   return 0;
}