Protected access specifier allows for a mix of public and private access specifiers. - C++ Class

C++ examples for Class:Member Access

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Introduction

protected access specifier acts like a public specifier for classes that derive from the current class, and it acts like a private specifier for external code.

Demo Code

#include <cinttypes>
#include <iostream>

using namespace std;

class Vehicle/*from w ww .jav a 2 s  .  co  m*/
{
protected:
    int m_NumberOfWheels{};

public:
    Vehicle() = default;
    int GetNumberOfWheels() const
    {
        return m_NumberOfWheels;
    }
};

class Car : public Vehicle
{
public:
    Car()
    {
        m_NumberOfWheels = 4;
    }
};

class Motorcycle : public Vehicle
{
public:
    Motorcycle()
    {
        m_NumberOfWheels = 2;
    }
};

int main(int argc, char* argv[])
{
    Car myCar{};
    cout << "A car has " << myCar.GetNumberOfWheels() << " wheels." << endl;

    Motorcycle myMotorcycle;
    cout << "A motorcycle has " << myMotorcycle.GetNumberOfWheels() << " wheels." << endl;

    return 0;
}

Result


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