// Fig. 13.1: fig13_01.cpp
// Aiming base-class and derived-class pointers at base-class
// and derived-class objects, respectively.
#include <iostream>
#include <iomanip>
#include "CommissionEmployee.h"
#include "BasePlusCommissionEmployee.h" 
using namespace std;

int main()
{
   // create base-class object
   CommissionEmployee commissionEmployee( 
      "Sue", "Jones", "222-22-2222", 10000, .06 );

   // create base-class pointer
   CommissionEmployee *commissionEmployeePtr = 0;

   // create derived-class object
   BasePlusCommissionEmployee basePlusCommissionEmployee(
      "Bob", "Lewis", "333-33-3333", 5000, .04, 300 );

   // create derived-class pointer
   BasePlusCommissionEmployee *basePlusCommissionEmployeePtr = 0;

   // set floating-point output formatting
   cout << fixed << setprecision( 2 );

   // output objects commissionEmployee and basePlusCommissionEmployee
   cout << "Print base-class and derived-class objects:\n\n";
   commissionEmployee.print(); // invokes base-class print
   cout << "\n\n";
   basePlusCommissionEmployee.print(); // invokes derived-class print
   
   // aim base-class pointer at base-class object and print
   commissionEmployeePtr = &commissionEmployee; // perfectly natural
   cout << "\n\n\nCalling print with base-class pointer to "
      << "\nbase-class object invokes base-class print function:\n\n";
   commissionEmployeePtr->print(); // invokes base-class print

   // aim derived-class pointer at derived-class object and print
   basePlusCommissionEmployeePtr = &basePlusCommissionEmployee; // natural
   cout << "\n\n\nCalling print with derived-class pointer to "
      << "\nderived-class object invokes derived-class " 
      << "print function:\n\n";
   basePlusCommissionEmployeePtr->print(); // invokes derived-class print

   // aim base-class pointer at derived-class object and print
   commissionEmployeePtr = &basePlusCommissionEmployee;
   cout << "\n\n\nCalling print with base-class pointer to "
      << "derived-class object\ninvokes base-class print "
      << "function on that derived-class object:\n\n";
   commissionEmployeePtr->print(); // invokes base-class print
   cout << endl;
} // end main


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