Teach Yourself Borland C++ in 14 Days - portal

NOTE
Totally Immersed: C++ Classes and Object-Oriented Programming
void ShutDown();
protected:
void StartupProcedure();
private:
void StartElectricalSystem();
void StartEngine();
int currentGear;
bool started;
int speed;
};
Notice how you break the class organization down into the three access levels. You may not
use all three levels of access in a given class. You are not required to use any of the access levels
if you don’t want, but typically you will have a public and a private section at the least.
Constructors
Class-member access defaults to private. If you do not add any access
keywords, all data and functions in the class will be private. A class
where all data members and functions are private is not very useful in
most cases.
Classes in C++ have a special function called the constructor.
The constructor is a function that is automatically called when an instance of a class
is created.
The constructor is used to initialize any class member variables, allocate memory the class will
need, or do any other startup tasks. The Vehicle example you just saw does not have a
constructor. If you do not provide a constructor, the C++Builder compiler will create a default
constructor for you. While this is OK for simple classes, you will almost always provide a
constructor for classes of any significance. The constructor must have the same name as the
name of the class. This is what distinguishes it as a constructor. Given that, let’s add a
constructor declaration to the Vehicle class:
NEW TERM
class Vehicle {
public:
Vehicle(); // constructor
bool haveKey;
bool Start();
void SetGear(int gear);
void Accelerate(int acceleration);
void Break(int factor);
void Turn(int direction);
void ShutDown();
99
4