Constants

Read pointer or Reference Parameters with const params backwards:

• Employee * const e
  • Constant pointer to e. Pointer cannot be changed, but the object can be.
• Employee const * e
  • Pointer to a constant Employee. Object can't be changed, pointer can be.
• Employee * const * e
  • Both the pointer and object are constant.

But const Employee & e is how you declare a constant reference parameter. e is a reference to a const employee.