CLASSES

We have already mentioned that objects contain data,and code to manipulate that data.The entire set of data and object can be made a user-defined data type with the help of class.Each object is actually a variable of the type “class”.Once a class has been defined we can create any number of objects of that class type and each object has data of type class with which they are created.A class is thus a collection of objects of similar type.For example , car ,trucks,trains etc are all objects of type “vehicle”.Classes are user-defined data types and behave like the built-in data types of a programming language.The syntax used to create an object is similar to that used for creating variables in C.The following is the syntax used for creating object “car” of type “vehicle” in C++ :

 vehicle car;