Use friend function to access the non-public member variable : Friend « Class « C++

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C++ » Class » Friend Screenshots  Use friend function to access the non-public member variable    #include <iostream> using namespace std; class MyClass {   int a, b;   public:     friend int sum(MyClass x);     void set_ab(int i, int j); }; void MyClass::set_ab(int i, int j) {   a = i;   b = j; } int sum(MyClass object) {   return object.a + object.b; } int main(void) {   MyClass integer;   cout << "Adding 3 and 4:" << endl;   integer.set_ab(3,4);   cout << sum(integer); }            Related examples in the same category 1. Friend function Demo 2. Make the inserter into a friend function 3. Define friend function for << 4. friend class for each other 5. Friends can access private members of a class.