#include <iostream>
using namespace std ;

//Using references to let a function be a l value
//Use case
//--------------------------------------------------------------------

class myVector
{
  public:
   int x1 ;
   int array1[3]  ;
    myVector():  array1{ 1, 2, 3 }
    {

    }

    int& operator[] (int index)
        {
          return array1[index]  ;
        }

};

//--------------------------------------------------------------------

int main()
{
    myVector myVectorObj ;
    cout << myVectorObj[0] << endl ;
    myVectorObj[0] = 100 ;
    cout << myVectorObj[0] << endl ;
    return(0)  ;
}

//--------------------------------------------------------------------