c-resources/CPlusPlus20ForProgrammers-m.../examples/ch10/fig10_09/fig10_09.cpp

42 lines
2.0 KiB
C++

// fig10_09.cpp
// Attempting to call derived-class-only functions
// via a base-class pointer.
#include <string>
#include "SalariedEmployee.h"
#include "SalariedCommissionEmployee.h"
int main() {
SalariedCommissionEmployee salariedCommission{
"Bob Lewis", 300.0, 5000.0, .04};
// aim base-class pointer at derived-class object (allowed)
SalariedEmployee* salariedPtr{&salariedCommission};
// invoke base-class member functions on derived-class
// object through base-class pointer (allowed)
std::string name{salariedPtr->getName()};
double salary{salariedPtr->getSalary()};
// attempt to invoke derived-class-only member functions
// on derived-class object through base-class pointer (disallowed)
double grossSales{salariedPtr->getGrossSales()};
double commissionRate{salariedPtr->getCommissionRate()};
salariedPtr->setGrossSales(8000.0);
}
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