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C-/C++-Quelltext

#include <string>
#include <iostream>

using namespace std;

// Vehicle base class
class Vehicle {
    public:
        Vehicle() {
            // Print information about this vehicle at initialization time
            cout << Info() << endl;
        }
        virtual string Info() {
            // Return empty string per default
            return "";
        }
};

// Car class implements "Vehicle" interface
class Car : public Vehicle {
    public:
        Car(int numWheels, int wheelPressure) {
            numWheels_ = numWheels;
            
            // Allocate array
            wheelPressures_ = new int[numWheels_];
            
            // Initialize array
            for (int i = 0; i < numWheels_; i++) {
                wheelPressures_[i] = wheelPressure;
            }
        }
        ~Car() {
            // Delete array
            delete [] wheelPressures_;
        }
        // Override information function
        string Info() {
            // Return car information
            return "Car: number of wheels = " + numWheels_;
        }
    private:
        int* wheelPressures_;
        int numWheels_;
};

// Entry point
int main() {
    // Allocate a new vehicle
    Vehicle* myVehicle = new Car(4, 3);
    
    // Print vehicle information
    cout << myVehicle.Info() << endl;
    
    // Delete vehicle
    delete myVehicle;
    
    return 0;
}

C-/C++-Quelltext

int m_member; // Variante 1
int member_; // Variante 2
int member; // Variante 3