Height using Operator Overloading of >> and <<

/** Height program has been edited to facilitate
    adding two objects of Height class using operator
    overloading. << and >> have also been overloaded.
*/

#include <iostream>
#include <cstdlib>

using namespace std;


class Height{
    int meter, centi_meter;
public:
    inline Height();
    inline Height(int ,int);
    inline Height(const Height&);
    inline ~Height();
    inline Height operator +(Height&);
    friend istream& operator >>(istream&, Height&);
    friend ostream& operator <<(ostream&, Height&);
};

istream& operator >>(istream &in, Height &obj){
    cout << "Meter = ";
    in >> obj.meter;
    cout << "Cetimeter = ";
    in >> obj.centi_meter;
    return in;
}

ostream& operator <<(ostream &out, Height &obj){
    out << obj.meter << "m " << obj.centi_meter << "cm" << endl;
    return out;
}

Height::Height(){
    meter = 0;
    centi_meter = 0;
}

Height::Height(int meter, int centi_meter){
    Height::meter = meter;
    Height::centi_meter = centi_meter;
}

Height::Height(const Height &copy){
    meter = copy.meter;
    centi_meter = copy.centi_meter;
}

Height::~Height(){

}

Height Height::operator +(Height &height){
    int c_m = (centi_meter + height.centi_meter) % 100;
    int m = (meter + height.meter) + ((centi_meter + height.centi_meter) / 100);
    return Height(m, c_m);
}

int main() {
    system("cls");
    Height obj1, obj2;
    cout << "Enter the first height" << endl;
    cin >> obj1;
    cout << "Enter the second height" << endl;
    cin >> obj2;
    Height result = obj1 + obj2;
    cout << " ";
    cout << obj1;
    cout << "+";
    cout << obj2;
    cout << "=";
    cout << result;
    cin.ignore();
    cin.get();
    return 0;
}