p10_7.cpp

《c＋＋大学教程实验指导书》源码

// P10_12: P10_7.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 <ctime>
#include <cstdlib>
#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 determineMonth();

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, 6, 15, 1944 );
   employees[ 1 ] = new CommissionEmployee( "Sue", "Jones", 
      "222-22-2222", 9, 8, 1954, 10000, .06 );
   employees[ 2 ] = new BasePlusCommissionEmployee( "Bob", 
      "Lewis", "333-33-3333", 3, 2, 1965, 300, 5000, .04 );
   employees[ 3 ] = new HourlyEmployee( "Karen", "Price", 
      "444-44-4444", 12, 29, 1960, 16.75, 40 );

   int month = determineMonth();

   // 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
      
      // if month of employee's birthday, and $100 to salary
      if ( employees[ i ]->getBirthDate().getMonth() == month )
         cout<< employees[ i ]->earnings() + 100.0
             << "HAPPY BIRTHDAY!\n";
      else
         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

// Determine the current month using standard library functions
// of ctime
int determineMonth()
{
   time_t currentTime;
   char monthString[ 3 ];

   time( &currentTime );
   strftime( monthString, 3, "%m", localtime( &currentTime ));
   return atoi( monthString );

} // end function determineMonth



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 * (C) Copyright 1992-2003 by Deitel & Associates, Inc. and Prentice      *
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