int main()
{
// set floating-point output formatting
cout << fixed << setprecision( 2 );
// create vector of four base-class pointers
vector < Employee * > employees( 4 );
// initialize vector with various kinds of Employees
employees[ 0 ] = new SalariedEmployee(
"John", "Smith", "111-11-1111", 800 );
employees[ 1 ] = new HourlyEmployee(
"Karen", "Price", "222-22-2222", 16.75, 40 );
employees[ 2 ] = new CommissionEmployee(
"Sue", "Jones", "333-33-3333", 10000, .06 );
employees[ 3 ] = new BasePlusCommissionEmployee(
"Bob", "Lewis", "444-44-4444", 5000, .04, 300 );
// polymorphically process each element in vector employees
for ( size_t i = 0; i < employees.size(); i++ )
{
employees[ i ]->print(); // output employee information
cout << endl;
// downcast pointer
BasePlusCommissionEmployee *derivedPtr =
dynamic_cast < BasePlusCommissionEmployee * >
( employees[ i ] );
// determine whether element points to base-salaried
// commission employee
if ( derivedPtr != 0 ) // 0 if not a BasePlusCommissionEmployee
{
double oldBaseSalary = derivedPtr->getBaseSalary();
cout << "old base salary: $" << oldBaseSalary << endl;
derivedPtr->setBaseSalary( 1.10 * oldBaseSalary );
cout << "new base salary with 10% increase is: $"
<< derivedPtr->getBaseSalary() << endl;
} // end if
cout << "earned $" << employees[ i ]->earnings() << "\n\n";
} // end for
// release objects pointed to by vector’s elements
for ( size_t j = 0; j < employees.size(); j++ )
{
// output class name
cout << "deleting object of "
<< typeid( *employees[ j ] ).name() << endl;
delete employees[ j ];
} // end for
return 0;
} // end main
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();
cout << "\n\n";
basePlusCommissionEmployee.print();
// aim base-class pounter 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 funciton\n\n";
commissionEmployeePtr->print(); //invokes base-class print function
//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();
//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();
cout << endl;
return 0;
} // end main
int main(int argc, const char *argv[]) {
// 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 dervied-class pointer
BasePlusCommissionEmployee *basePlusCommissionEmployeePtr = 0;
// set floating-point output formatting
std::cout << std::fixed << std::setprecision(2);
// output objects using static binding
std::cout << "Invoking print function on base-class and derived-class "
<< "\nobject with static binding\n\n";
commissionEmployee.print(); // static binding
std::cout << "\n\n";
basePlusCommissionEmployee.print(); // static binding
// output objects with dynamic binding
std::cout << "\n\n\nInvoking print function on base-class and "
<< "derived-class \nobjects with dynamic binding";
// aim base-class pointer at base-class object and print
commissionEmployeePtr = &commissionEmployee;
std::cout << "\n\nCalling virtual function print with derived-class "
<< "pointer\nto derived-class object invokes derived-class "
<< "print function:\n\n";
basePlusCommissionEmployeePtr->print();
// aim base-class pointer at derived-class object and print
commissionEmployeePtr = &basePlusCommissionEmployee;
std::cout << "\n\nCalling virtual function print with base-class pointer"
<< "\nto derived-class object invokes derived-class "
<< "print function:\n\n";
// polymorphism; invokes BasePlusCommissionEmployee's print;
// base-class pointer to derived-class object
commissionEmployeePtr->print();
std::cout << std::endl;
return 0;
}
int main()
{
// set floating-point output formatting
cout << fixed << setprecision( 2 );
// create vector of four base-class pointers
vector < Employee * > employees( 4 );
// initialize vector with Employees
employees[ 0 ] = new SalariedEmployee(
"John", "Smith", "111-11-1111", 6, 15, 1944, 800 );
employees[ 1 ] = new HourlyEmployee(
"Karen", "Price", "222-22-2222", 12, 29, 1960, 16.75, 40 );
employees[ 2 ] = new CommissionEmployee(
"Sue", "Jones", "333-33-3333", 9, 8, 1954, 10000, .06 );
employees[ 3 ] = new BasePlusCommissionEmployee(
"Bob", "Lewis", "444-44-4444", 3, 2, 1965, 5000, .04, 300 );
int month = determineMonth();
cout << "Employees processed polymorphically via dynamic binding:\n\n";
for ( size_t i = 0; i < employees.size(); i++ )
{
employees[ i ]->print(); // output employee information
cout << endl;
// downcast pointer
BasePlusCommissionEmployee *derivedPtr =
dynamic_cast < BasePlusCommissionEmployee * >
( employees[ i ] );
// determine whether element points to base-salaried
// commission employee
if ( derivedPtr != 0 ) // 0 if not a BasePlusCommissionEmployee
{
double oldBaseSalary = derivedPtr->getBaseSalary();
cout << "old base salary: $" << oldBaseSalary << endl;
derivedPtr->setBaseSalary( 1.10 * oldBaseSalary );
cout << "new base salary with 10% increase is: $"
<< derivedPtr->getBaseSalary() << endl;
} // end if
// get current employee's birthday
Date birthday = employees[ i ]->getBirthDate();
// if current month is employee's birthday month, add $100 to salary
if ( birthday.getMonth() == month )
cout << "HAPPY BIRTHDAY!\nearned $"
<< ( employees[ i ]->earnings() + 100.0 ) << endl;
else
cout << "earned $" << employees[ i ]->earnings() << endl;
cout << endl;
} // end for
// release objects pointed to by vector’s elements
for ( size_t j = 0; j < employees.size(); j++ )
{
// output class name
cout << "deleting object of "
<< typeid( *employees[ j ] ).name() << endl;
delete employees[ j ];
} // end for
} // end main