📘 Lesson · Lesson 68

Friend Function & Class

What is a Friend Function?

💡 Note

A friend function is not a member of a class but is allowed to access its private and protected members.

Example

C++

#include <iostream>
using namespace std;
class Box {
    int width = 10;
    friend void show(Box b);   // friend declaration
};
void show(Box b) {
    cout << "Width: " << b.width;   // can access private
}
int main() { show(Box()); return 0; }

Output:
Width: 10

Summary

A friend function/class can access private members of a class.
Declared with the friend keyword inside the class.

Friend Function क्या है?

💡 Note

Friend function class का member नहीं होता पर उसके private और protected members access कर सकता है।

Example

C++

#include <iostream>
using namespace std;
class Box {
    int width = 10;
    friend void show(Box b);   // friend declaration
};
void show(Box b) {
    cout << "Width: " << b.width;   // private access कर सकता है
}
int main() { show(Box()); return 0; }

Output:
Width: 10

सारांश

Friend function/class किसी class के private members access कर सकता है।
Class के अंदर friend keyword से declare होता है।

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