#include <iostream>
using namespace std;
 
class Number
{
    int num;
    public:
    Number()
    {
        cout<<"Enter number: ";
        cin>>num;
    }
    void display()
    {
        cout<<num<<' ';
    }
    friend void Greatest(Number&, Number&,Number&);
};
 
void Greatest(Number& obj1,Number& obj2,Number& obj3)
{
    cout<<"\nGreatest number is: ";
    cout<<max(obj1.num,max(obj2.num,obj3.num));
}
 
int main()
{
    Number obj1,obj2,obj3;
    Greatest(obj1,obj2,obj3);
 
    return 0;
}
 

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