Which Rule Will Not Affect The Friend Function?

Is it necessary to pass argument in a friend function?

It is possible, to have a friend function with no arguments.

It Seldom used.

Of course it is possible..

What is the use of this pointer?

The this pointer is an implicit parameter to all member functions. Therefore, inside a member function, this may be used to refer to the invoking object. Friend functions do not have a this pointer, because friends are not members of a class. Only member functions have a this pointer.

Which one is wrong about a function that is friend of a class?

If a function is friend of a class, which one of the following is wrong? A function can only be declared a friend by a class itself. Friend functions are not members of a class, they are associated with it. … It can have access to all members of the class, even private ones.

Which of the following can never be sent by call?

Discussion ForumQue.Which of the following can never be sent by call-by-value?b.Arrayc.Structuresd.Both Array and StructuresAnswer:Array1 more row•Sep 14, 2020

How do you declare a friend function?

If a function is defined as a friend function in C++, then the protected and private data of a class can be accessed using the function….Declaration of friend function in C++class class_name.{friend data_type function_name(argument/s); // syntax of friend function.};

What holds true for friend function?

A friend function of a class is defined outside that class’ scope but it has the right to access all private and protected members of the class. Even though the prototypes for friend functions appear in the class definition, friends are not member functions.

Which of the following is not a file opening mode?

4. Which of the following is not used as a file opening mode? Explanation: ios::trunc is used to truncate a file if it exists. It is not a file opening mode.

Which of the following is important in a function?

Explanation: The important things required in a function is its return type and its name other than that parameter list are optional which a function may or may not have.

What is constant member function?

The const member functions are the functions which are declared as constant in the program. The object called by these functions cannot be modified. It is recommended to use const keyword so that accidental changes to object are avoided. A const member function can be called by any type of object.

What is a friend function Why is it required?

Why friend Functions are needed in C++ The keyword friend is a function specifier and gives a non-member function access to the hidden members of the class, and provides a method of escaping the data hiding restrictions of C++. … Some functions need privileged access to more than one class.

What is the difference between friend class and friend function?

Friend function is a function that is able to access the private and protected members of a class. In contrast, a friend class is a class which help in accessing the private members of a class. A friend function is declared by including its prototype inside the class, antecede it with the keyword friend.

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.

Which of the following is not true about friend functions?

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.

Which member function doesn’t require any return type?

Which member function doesn’t require any return type? Explanation: All the member functions work same as normal functions with syntax. But the constructor and destructor are also considered as member functions of a class, and they never have any data type.

What does Seekg () do Mcq?

Explanation: The member function seekg is used to position back from the end of file object. … Explanation: The stringstream, ostringstream, and istringstream objects are used for input and output to a string.

What are the merits and demerits of using friend function?

merits: we can able to access the other class members in our class if,we use friend keyword. we CAN access the members without inheriting the class. demerits: Maximum size of the memory will occupied by objects according to the size of friend Members. we cant do any run time ploymorphism concepts in those members.

What is the syntax of friend function?

A friend function is declared inside the class with a friend keyword preceding as shown below. class className{ …… friend returnType functionName(arg list); }; As shown above, the friend function is declared inside the class whose private and protected data members are to be accessed.

What is friend function with example?

In object-oriented programming, a friend function, that is a “friend” of a given class, is a function that is given the same access as methods to private and protected data. … Friend functions allow alternative syntax to use objects, for instance f(x) instead of x.f() , or g(x,y) instead of x.g(y) .

Can main () function be made private *?

Can main() function be made private? Explanation: The reason given in option “No, because main function is user defined” is wrong. The proper reason that the main function should not be private is that it should be accessible in whole program. This makes the program flexible.

What are the first and second arguments of Fopen?

1. The first and second arguments of fopen are? A. A character string containing the name of the file & the second argument is the mode.

What will strcmp () function do?

int strcmp (const char* str1, const char* str2); The strcmp() function takes two strings and returns an integer. The strcmp() compares two strings character by character. If the first character of two strings is equal, the next character of two strings are compared.

Can we define friend function inside the class?

Friend functions can be defined (given a function body) inside class declarations. These functions are inline functions, and like member inline functions they behave as though they were defined immediately after all class members have been seen but before the class scope is closed (the end of the class declaration).

Why do we need the friend class and function?

A proper use of friend classes increases encapsulation, because it allows to extend the private access of a data-structure to its parts — which the data-structure owns — without allowing private access to any other external class.

Which rule will not affect the friend function 10 points?

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. Which keyword is used to declare the friend function?