Add Default Constructors to a class - C++ Class

C++ examples for Class:Constructor

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Description

Add Default Constructors to a class

Demo Code

#include <cinttypes>
#include <iostream>

using namespace std;

class Car/*  w w w .  ja v  a2 s.c om*/
{
private:
    int m_NumberOfWheels{};

public:
    Car() = default;

    Car(int numberOfWheels)
        : m_NumberOfWheels{ numberOfWheels }
    {

    }

    int GetNumberOfWheels()
    {
        return m_NumberOfWheels;
    }
};

int main(int argc, char* argv[])
{
    Car myCar{ 4 };
    cout << "Number of wheels: " << myCar.GetNumberOfWheels() << endl;

    Car myMotorcycle{ 2 };
    cout << "Number of wheels: " << myMotorcycle.GetNumberOfWheels() << endl;

    Car noWheels;
    cout << "Number of wheels: " << noWheels.GetNumberOfWheels() << endl;

    return 0;
}

Result


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