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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16.7 POINTERS TO MEMBERS
We have seen that pointers pointing to various types are considered belonging to separate types. Consider a case where we have a member of a class of type int. Will it be safe to point to this member with ordinary pointer? The answer is obviously no. Hence, C++ has defined a separate syntax for pointes to members (both data members and methods).
Pointer to data member
Two operators, namely (.*) and (->*) are designed for this purpose. Consider a class Date. Let it have a member of type int. If we want to declare a pointer to it we have to first declare as follows.
int Date::* ptrl =&Date::year;
This declaration defines a pointer ptr1. It points to data member of class Date. If you observe the declaration carefully, ...
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