// Example 10.9. Test program for templated swap

#include <iostream>

using namespace std;

template <class T>
void swap(T& x, T& y);

int main()
{
   char s = '*', t = '$';
   cout << "Before swap s = " << s << ", t = " << t << endl;
   swap(s, t);
   cout << "After  swap s = " << s << ", t = " << t << endl << endl;

   float u = 3.3, v = 4.4;
   cout << "Before swap u = " << u << ", v = " << v << endl;
   swap(u, v);
   cout << "After  swap u = " << u << ", v = " << v << endl;

   return 0;
}

//
// Templated function to swap the values in two parameters
// Pre:  x and y have values of the same type.
// Post: The values of x and y have been swapped.
//

template <class T>
void swap(T& x, T& y)
{
   T temp;

   temp = x;
   x    = y;
   y    = temp;
}