privacy.cc

#include <iostream>

class MyClass {
private:
	int my_private_member;
public:
	static int MyClass::* p;

	int member_val() {
		return my_private_member;
	}
};

int MyClass::* MyClass::p = &MyClass::my_private_member;

int main(int argc, char** argv) {
	int MyClass::* pmem = MyClass::p;

	MyClass instance;
	instance.*pmem = 0;
	instance.*pmem = 5;

	if (instance.member_val() != 5) {
		std::cerr << "Something bad happened\n";
	}

	return 0;
}