fig10_33.cpp

来自「《c＋＋大学教程》源码」· C++ 代码 · 共 100 行

// Fig. 10.33: fig10_33.cpp
// Driver for Employee hierarchy.
#include <iostream>

using std::cout;
using std::endl;
using std::fixed;

#include <iomanip>

using std::setprecision;
  
#include <vector>

using std::vector;

#include <typeinfo>

#include "employee.h"    // Employee base class 
#include "salaried.h"    // SalariedEmployee class 
#include "commission.h"  // CommissionEmployee class 
#include "baseplus.h"    // BasePlusCommissionEmployee class 
#include "hourly.h"      // HourlyEmployee class 

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

   // create vector employees
   vector < Employee * > employees( 4 );

   // initialize vector with Employees
   employees[ 0 ] = new SalariedEmployee( "John", "Smith", 
      "111-11-1111", 800.00 );
   employees[ 1 ] = new CommissionEmployee( "Sue", "Jones", 
      "222-22-2222", 10000, .06 );
   employees[ 2 ] = new BasePlusCommissionEmployee( "Bob", 
      "Lewis", "333-33-3333", 300, 5000, .04 );
   employees[ 3 ] = new HourlyEmployee( "Karen", "Price", 
      "444-44-4444", 16.75, 40 );

   // generically process each element in vector employees
   for ( int i = 0; i < employees.size(); i++ ) {

      // output employee information
      employees[ i ]->print();  

      // downcast pointer
      BasePlusCommissionEmployee *commissionPtr = 
         dynamic_cast < BasePlusCommissionEmployee * >
            ( employees[ i ] );

      // determine whether element points to base-salaried 
      // commission worker
      if ( commissionPtr != 0 ) {
         cout << "old base salary: $" 
              << commissionPtr->getBaseSalary() << endl;
         commissionPtr->setBaseSalary( 
            1.10 * commissionPtr->getBaseSalary() );
         cout << "new base salary with 10% increase is: $" 
              << commissionPtr->getBaseSalary() << endl;

      } // end if
                               
      cout << "earned $" << employees[ i ]->earnings() << endl;

   } // end for   
 
   // release memory held by vector employees
   for ( int j = 0; j < employees.size(); j++ ) {

      // output class name
      cout << "\ndeleting object of " 
           << typeid( *employees[ j ] ).name();

      delete employees[ j ];

   } // end for

   cout << endl;

   return 0;

} // end main

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