函数友元(Friend Function) 可以将一个函数声明为一个类的友元函数。这样,在友元函数中可以直接访问该类的私有成员。友元函数可以是非成员函数,也可以是其他类的成员函数。友元函数通常在类的声明部分或声明外部使用 friend 关键字来声明。 3.1示例代码 class MyClass { private: int privateData; public: MyClass(...
C++ Friend Functions - 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
// classes_as_friends1.cpp// compile with: /cclassB;classA{public:intFunc1( B& b );private:intFunc2( B& b ); };classB{private:int_b;// A::Func1 is a friend function to class B// so A::Func1 has access to all members of BfriendintA::Func1( B& ); };intA::Func1(...
首先,C++中的友元函数(friend function)是一种特殊的函数,它可以访问类中的私有成员和保护成员,即使该函数不是类的成员函数。友元函数不是类的成员,因此不能直接访问类中的私有成员和保护成员。 重载运算符是C++中的一种特殊函数,它可以使我们使用自定义的运算符来操作类的对象。例如,我们可以重载加法运算符(+)来...
// classes_as_friends1.cpp// compile with: /cclassB;classA{public:intFunc1( B& b );private:intFunc2( B& b ); };classB{private:int_b;// A::Func1 is a friend function to class B// so A::Func1 has access to all members of BfriendintA::Func1( B& ); };intA::Func1(...
Friend function is a non-member function that can access the private and protected members of a class. “Friend” is a keyword used to indicate that a function is the friend of a class. This allows the compiler to know that the particular function is a friend of the given class. The fr...
Example 1: Working of friend Function // C++ program to demonstrate the working of friend function#include<iostream>usingnamespacestd;classDistance{private:intmeter;// friend functionfriendintaddFive(Distance);public: Distance() : meter(0) {} };// friend function definitionintaddFive(Distance d...
Write a C++ program to Operator Overloading Using a Friend Function. Next → ← Prev Like/Subscribe us for latest updates About Dinesh Thakur Dinesh Thakur holds an B.C.A, MCDBA, MCSD certifications. Dinesh authors the hugely popular Computer Notes blog. Where he writes how-to guides ar...
I know about access specifiers...friend function vs setter/getter functions. Thats all I want to know. 23rd Mar 2019, 6:46 PM J3fro C + 1 Getter/setter function may be used by anything outside of class (if public). Friend function may access private/protected fields of the class even...
Check out our YouTube video on C programming language for the absolute beginnersWhat is Friend Function in C++?Friend functions in C++ allow external functions or classes to access private and protected members of a class. This can be useful for sharing data between different parts of a program...