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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5.11 FRIEND FUNCTIONS
When we define a class with private data members, we have difficulty in handling them outside the class. If we want safety, there has to be restrictions. Nevertheless, there can be special cases or exceptions to the rule. Well, the concept of friend function has been introduced in the language for this purpose. Inside the class, we can declare a function as friend of that class. This function will be defined outside the class as independent function. It will be able to access private data members of the class.
Let us study the concept with the help of a program.
Problem: Write a program to compare two time objects. Develop method compare() to decide whether time t1 is equal to time t2 or not.
Solution: See Program 5.8.
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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