// Soln5_2.cpp
  include <iostream>
  using std::cout;
  using std::endl;
  
  // Swap two integers
  void swap(int* pa, int* pb)
  {
     int temp;
  
     temp = *pa;
     *pa = *pb;
     *pb = temp;
  }
  
  int main()
  {
     int a=6, b=4;
     cout << "Before swap:" << endl;
     cout << "a = " << a << ", b = " << b << endl;
  
     swap(&a, &b);
     cout << "After swap:" << endl;
     cout << "a = " << a << ", b = " << b << endl;
     return 0;
  }