Derived Classes

A derived class inherits members from its base class and adds its own members.

derived_classes.cpp

#include <iostream>
#include <string>

class Vehicle {
public:
    int speed;
};

class Bicycle : public Vehicle {
public:
    int gears;
};

int main() {
    int speed = ;
    int gears = ;

    Bicycle bike;
    bike.speed = speed;
    bike.gears = gears;

    std::cout << "speed=" << bike.speed << std::endl;
    std::cout << "gears=" << bike.gears << std::endl;
    return 0;
}

#include <iostream>
#include <string>

class Vehicle {
public:
    int speed;
};

class Bicycle : public Vehicle {
public:
    int gears;
};

int main() {
    int speed = ;
    int gears = ;

    Bicycle bike;
    bike.speed = speed;
    bike.gears = gears;

    std::cout << "speed=" << bike.speed << std::endl;
    std::cout << "gears=" << bike.gears << std::endl;
    return 0;
}

#include <iostream>
#include <string>

class Vehicle {
public:
    int speed;
};

class Bicycle : public Vehicle {
public:
    int gears;
};

int main() {
    int speed = ;
    int gears = ;

    Bicycle bike;
    bike.speed = speed;
    bike.gears = gears;

    std::cout << "speed=" << bike.speed << std::endl;
    std::cout << "gears=" << bike.gears << std::endl;
    return 0;
}

#include <iostream>
#include <string>

class Vehicle {
public:
    int speed;
};

class Bicycle : public Vehicle {
public:
    int gears;
};

int main() {
    int speed = ;
    int gears = ;

    Bicycle bike;
    bike.speed = speed;
    bike.gears = gears;

    std::cout << "speed=" << bike.speed << std::endl;
    std::cout << "gears=" << bike.gears << std::endl;
    return 0;
}

#include <iostream>
#include <string>

class Vehicle {
public:
    int speed;
};

class Bicycle : public Vehicle {
public:
    int gears;
};

int main() {
    int speed = ;
    int gears = ;

    Bicycle bike;
    bike.speed = speed;
    bike.gears = gears;

    std::cout << "speed=" << bike.speed << std::endl;
    std::cout << "gears=" << bike.gears << std::endl;
    return 0;
}

#include <iostream>
#include <string>

class Vehicle {
public:
    int speed;
};

class Bicycle : public Vehicle {
public:
    int gears;
};

int main() {
    int speed = ;
    int gears = ;

    Bicycle bike;
    bike.speed = speed;
    bike.gears = gears;

    std::cout << "speed=" << bike.speed << std::endl;
    std::cout << "gears=" << bike.gears << std::endl;
    return 0;
}

#include <iostream>
#include <string>

class Vehicle {
public:
    int speed;
};

class Bicycle : public Vehicle {
public:
    int gears;
};

int main() {
    int speed = ;
    int gears = ;

    Bicycle bike;
    bike.speed = speed;
    bike.gears = gears;

    std::cout << "speed=" << bike.speed << std::endl;
    std::cout << "gears=" << bike.gears << std::endl;
    return 0;
}

#include <iostream>
#include <string>

class Vehicle {
public:
    int speed;
};

class Bicycle : public Vehicle {
public:
    int gears;
};

int main() {
    int speed = ;
    int gears = ;

    Bicycle bike;
    bike.speed = speed;
    bike.gears = gears;

    std::cout << "speed=" << bike.speed << std::endl;
    std::cout << "gears=" << bike.gears << std::endl;
    return 0;
}

#include <iostream>
#include <string>

class Vehicle {
public:
    int speed;
};

class Bicycle : public Vehicle {
public:
    int gears;
};

int main() {
    int speed = ;
    int gears = ;

    Bicycle bike;
    bike.speed = speed;
    bike.gears = gears;

    std::cout << "speed=" << bike.speed << std::endl;
    std::cout << "gears=" << bike.gears << std::endl;
    return 0;
}

derived class The `:` syntax names the base class a derived class inherits from.