Question

Which of the following is the correct way to declare a friend function in a class?

• A. void friend display();
• B. public: friend void display();
• C. friend void display();
• D. friend class display;

Hint:

Where must the friend keyword sit, and does an access label like public matter for friendship?

Answer 1

The Correct Option is C

Step 1: A friend function is declared inside the class with the keyword friend placed first, followed by the normal function signature.

Step 2: The correct form is:
 friend void display();
Here friend comes before the return type void and the function name.

Step 3: Check the wrong options. Option A writes void friend display(), which puts the keyword in the wrong place and is invalid syntax. Option D uses friend class display, which declares a friend class, not a friend function.

Step 4: Option B, public: friend void display(), is a common trap. Friendship is not affected by access labels, so adding public: is pointless and not the standard declaration. The clean, standard declaration is option C.

Answer: option C.