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You don’t explicitly call a constructor; however, whenever you instantiate a new object, its constructor is automatically called. In main(), I put my constructor into action with the following code:
Critter crit(7);
When crit is instantiated, its constructor is automatically called and the message A new critter has been born! is displayed. Then, the constructor assigns 7 to the object’s m_Hunger data member.
To prove that the constructor worked, back in main(), I call the object’s Greet() member function and sure enough, it displays Hi. I’m a critter. My hunger level is 7.
264 Chapter 8 n Classes: Critter Caretaker