CS202 3- ‹#›
Copy Constructors
nWhen we explicitly define either a copy constructor or an assignment operator in a derived class, we are responsible for ensuring that the base class copy constructor and assignment operator are called. This is because when we implement our own copy constructor or assignment operator, the compiler no longer provides an implicit one and cannot guarantee that the base class copy constructor or assignment op are called.
nFor the copy constructor, we specify the base class' copy constructor in the initialization list of the
derived class' copy
constructor.
student::student(const student &s) :
checking(s) {
...
This works because a student object is a checking object; checking’s constructor my be implicit or explicitly defined.