//Exercise 9.1 - 
#include <iostream>
  
int main()
{
   int  varOne = 1;     // sets varOne to 1
   int& rVar = varOne;
   int* pVar = &varOne;
   rVar = 5;            // sets varOne to 5
   *pVar = 7;           // sets varOne to 7

   // All three of the following will print 7: 
   std::cout << "variable:  " << varOne << std::endl;
   std::cout << "reference: " << rVar   << std::endl;
   std::cout << "pointer:   " << *pVar  << std::endl;

   return 0;
}