Access Specifiers

1class MyClass {
2public:
3    int publicVar;      // Accessible everywhere
4    void publicMethod();
5
6private:
7    int privateVar;     // Only accessible within class
8    void privateMethod();
9
10protected:
11    int protectedVar;   // Accessible in class and derived classes
12    void protectedMethod();
13};
14
15// struct vs class
16struct MyStruct {
17    int x;  // public by default
18};
19
20class MyClass2 {
21    int x;  // private by default
22};
23
24// Friend can access private members
25class Secret {
26    int value = 42;
27    friend void reveal(const Secret& s);
28};
29
30void reveal(const Secret& s) {
31    cout << s.value;  // OK - friend access
32}