variable-sized object may not be initialized

//int main()
//{
//    int n;
//   
//    cout << "Welcome to a much better class demo!" << endl
//         << "How many employees do you want to index?" << endl;
//    cin  >> n;
//   
//    const int EMS = n;
//   
//    Employee theEmployees[EMS]=
//    {
//         Employee(),
//    };
//}

For some reason this gives me the error "variable-sized object 'theEmployees' may not be initialized"

It works fine with an absolute numerical value for the array size, not sure why the variable won't work.