Convert Kilometer into Miles using Constructor in C++

#include <iostream>



class Kilometers
{
private:
    double kilometers;
public:
    Kilometers(double kilometers): kilometers(kilometers) {}
    void display()
    {
        cout << kilometers << " kilometeres";
    }
    double getValue()
    {
        return kilometers;
    }
};

class Miles
{
private:
    double miles;
public:
    Miles(double miles) : miles(miles) {}
    void display()
    {
        cout << miles << " miles";
    }
    operator Kilometers()
    {
        return Kilometers(miles*1.609344);
    }
    Miles(Kilometers kilometers)
    {
        miles = kilometers.getValue()/1.609344;
    }
};


int main(void)
{
    /*
     * Converting using the conversion function
     */
    Miles m1 = 100;
    Kilometers k1 = m1;

    m1.display();
    cout << " = ";
    k1.display();
    cout << endl;

    /*
     * Converting using the constructor
     */
    Kilometers k2 = 100;
    Miles m2 = k2;    // same as:  Miles m2 = Miles(k2);
    k2.display();
    cout << " = ";
    m2.display();
    cout << endl;

}

for more codes you can visit http://codesofprogramming.blogspot.in/