What is a friend function in C++ ?

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Rahul Jain

Linux Trainer And developer

For this you must have the knowledge of OOP first. That what is Inheritance, Well as the name says friend. Instead of inheritance a friend function or variable can access your class. Check this example as here this function is not a member of any class but in class box it is declared as friend, so...
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For this you must have the knowledge of OOP first. That what is Inheritance, Well as the name says friend. Instead of inheritance a friend function or variable can access your class. Check this example as here this function is not a member of any class but in class box it is declared as friend, so you can access it with class constraints. read less
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A friend function is a function defined outside a class scope and declared in the class definition as friend function. Even though a friend function is not a member of a class its is still has the right to access all private and protected members of the class.
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CS Master

One of the important concept of OOP is data hiding, i.e., a nonmember function cannot access an object's private or protected data. But, sometimes this restriction may force programmer to write long and complex codes. So, there is mechanism built in C++ programming to access private or protected data...
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One of the important concept of OOP is data hiding, i.e., a nonmember function cannot access an object's private or protected data. But, sometimes this restriction may force programmer to write long and complex codes. So, there is mechanism built in C++ programming to access private or protected data from non-member function which is friend function and friend class. read less
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IT

Friend function is a non- member function of a class and it has special privileges to access the private members of a class. if any function declare preceding with "friend" keyword and outside of the class such function is called as friend function.
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