May 2012
Intermediate to advanced
679 pages
16h 56m
English
Content preview from Object Oriented Programming with C++, Second EditionBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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16.2 “const” WITH CLASS OBJECTS
In previous example, we saw the use of “const” with pointers. It is also possible to use it with class objects and class members.
16.2.1 “const” Class object
It is possible to declare an object as constant. Assume we have class Point suitably defined. Now we are allowed to declare
const Point pt1;
It declares a constant object named pt1 of type Point. You will ask me what the use of this declaration is. Well, now compiler will not allow us to modify this object. It means you cannot modify even its public data members! Well we may say that we have achieved “read only” objects.
16.2.2 “const” With data members
C++ allows us to make a data member constant. The constants are normally initialized at the declaration. ...
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