#include <iostream>

inline int Double(int);

int main()
{
   int target;
   using std::cout;
   using std::cin;
   using std::endl;

   cout << "Enter a number to work with: ";
   cin >> target;
   cout << "\n";

   target = Double(target);
   cout << "Target: " << target << endl;

   target = Double(target);
   cout << "Target: " << target << endl;

   target = Double(target);
   cout << "Target: " << target << endl;
   return 0;
}

int Double(int target)
{
   return 2*target;
}
