1. Which rule will not affect the friend function? Explanation: Friend is used to access private and protected members of a class from outside the same class. 2.
What is the disadvantage of friend function?
The major disadvantage of friend functions is that they require an extra line of code when you want dynamic binding. To get the effect of a virtual friend , the friend function should call a hidden (usually protected ) virtual member function. This is called the Virtual Friend Function Idiom.
Does a friend function violate the data hiding?
Use of friend functions is rare, since it violates the rule of encapsulation and data hiding. The function can be declared in public or private sections without changing its meaning.
What property does friend function violate?
A friend function in the class declaration doesn’t violate encapsulation any more than a public member function violates encapsulation: both have exactly the same authority with respect to accessing the class’s non-public parts.)
Why are friend Classes bad?
2 Answers. Both getters and setters and friend classes reduce encapsulation and increase coupling. At least friendship restricts the reduced encapsulation to the explicitly specified classes that need the extra access.
What is friend function and why they are needed?
A friend class is used when we need to access private and protected members of the class in which it has been declared as a friend. It is also possible to declare only one member function of another class to be a friend.
What is the advantage of friendship?
Boost your happiness and reduce your stress. Improve your self-confidence and self-worth. Help you cope with traumas, such as divorce, serious illness, job loss or the death of a loved one. Encourage you to change or avoid unhealthy lifestyle habits, such as excessive drinking or lack of exercise.
Can a friend function be virtual?
You can declare a virtual function to be a friend of another class. If a function is declared virtual in its base class, you can still access it directly using the scope resolution ( :: ) operator.
Which of the following is incorrect about friend functions?
Explanation: The program follows correct syntax and semantics hence no errors. … Explanation: Friend functions are not in the scope of a class and hence cannot be called through a class object. A friend function can access all types of members of the class. They can be invoked as a normal function.
What is the difference between normal function and template function?
What is the difference between normal function and template function? Explanation: As a template feature allows you to write generic programs. therefore a template function works with any type of data whereas normal function works with the specific types mentioned while writing a program.
Where does keyword friend should be placed?
The keyword friend is placed only in the function declaration of the friend function and not in the function definition because it is used toaccess the member of a class.
What are the privileges of friend functions?
Benefits of friend function
A friend function is used to access the non-public members of a class. It allows to generate more efficient code. It provides additional functionality which is not normally used by the class. It allows to share private class information by a non member function.
Can a virtual function be friend of another class?
A virtual function can be a friend function of another class. … They are always defined in the base class and overridden in a derived class. It is not mandatory for the derived class to override (or re-define the virtual function), in that case, the base class version of the function is used.
How can a friend function access private members?
A friend function cannot access the private and protected data members of the class directly. It needs to make use of a class object and then access the members using the dot operator. A friend function can be a global function or a member of another class.
What are the 5 stages of friendship?
Myles Munroe. In the image, there are five stages of friendship development, which are: Stranger, Acquaintance, Casual Friend, Close Friend, and Intimate Friend. I will provide an explanation of the different stages of progression of a friendship.
What are the 3 types of friendship?
Aristotle figured there were three kinds of friendships:
- Friendships of utility: exist between you and someone who is useful to you in some way. …
- Friendships of pleasure: exist between you and those whose company you enjoy. …
- Friendships of the good: are based on mutual respect and admiration.
What makes a strong friendship?
If you and your friend have trust, equality, compassion, honesty, and independence, you already have the foundation of a strong and healthy friendship. Even though it can be hard to recognize when a friendship is weak in some areas, it is always possible to improve yourself and your relationship with a friend.
What is friend function example?
A friend function is a function that is specified outside a class but has the ability to access the class members’ protected and private data. A friend can be a member’s function, function template, or function, or a class or class template, in which case the entire class and all of its members are friends.
What is the difference between friend function and member function?
Friend function is a non-member function that has access to private and protected members of a class. It is not in the scope of the class in which it is declared. Member function is in scope of the class in which it is declared. A friend function cannot be called using object of the class.
What is the difference between friend function and inline function explain with examples?
Answer: A friend function is used to access non public members of the class. A friend function cannot be called by class object. … And the Inline functions are functions where the call is made to inline functions.
Are C++ friends bad?
The most of OOP experts dislike friend function simply because they want the OOP part of C++ to behave like Smalltalk. But C++ is not Smalltalk, and they cannot even understand that friend don’t break encapsulation, for the very simple reason that a function cannot be friend of your class without your class wants it.
Can friend classes be inherited?
The answer is very simple: no, subclasses do not inherit friend associations. A friend can only access the private members of the class the association is declared in, not those of parents and/or children of that class.
What is the correct syntax of inheritance?
Which is the correct syntax of inheritance? Explanation: Firstly, keyword class should come, followed by the derived class name. Colon is must followed by access in which base class has to be derived, followed by the base class name. And finally the body of class.