access private data members of a class without using a member or a friend function

#include using namespace std;   class Test { private:     int data; public:     Test() { data = 0; }     int getData() { return data; } };   int main() {     Test t;     int* ptr = (int*)&t;     *ptr = 10;     cout << t.getData();     return 0; }

Out : 10


Note that the above way of accessing private data members is not at all a recommended way of accessing members and should never be used.