C++ program to overload Less Than (<) operator

//to check whether one object is less than or not
//by friend function
//class Distance with m and cm as members

#include <iostream>
using namespace std;
class Distance
{
    int m,cm;
    public:
        void read()
        {
            cout<<"Enter m and cm: ";
            cin>>m>>cm;
        }
        // void display()
        // {
        // cout<<m<<"m "<<cm<<"cm"<<endl;
        // }
        friend bool operator<(Distance d1,Distance d2) //friend function
        {
            float m1=d1.m+(d1.cm/100);
            float m2=d2.m+(d2.cm/100);
            return ((m1<m2)?true:false);
        }
};
int main()
{
    Distance d1,d2;
    d1.read();
    d2.read();
    if(d1<d2) //same as operator<(d1,d2);
        cout<<"the d1 is less than d2.";
    else
        cout<<"the d1 is not less than d2.";
    return 0;
}