private可以防止其他模块进行访问，但如果利用指针，是否可以在其他模块获取到private的数据？
下面对此进行实验：

实验

#include "pch.h"
#include <iostream>
using namespace std;
class A {
public:
	A() {
		a2 = 3;
		a3 = 4;
	}
	int* fun3() {
		cout << "a3=" <<a3 << endl;   //正确，类内访问
		return &a3;
	}
	int* fun2() {
		cout << "a2=" << a2 << endl;   //正确，类内访问
		return &a2;
	}

protected:
	int a2;
private:
	int a3;
};
int main() {
	A itema;
	int* mytest;
	//不能直接获取
	//cout << "直接获取private值a3=" << itema.a3 << endl;
	mytest = itema.fun3();
	cout << "通过指针获取private值a3="<<*mytest << endl;
	*mytest = 1;
	cout << "对private值进行修改：";
	itema.fun3();

	mytest = itema.fun2();
	cout << "通过指针获取protected值a3=" << *mytest << endl;
	*mytest = 1;
	cout << "对private值进行修改：";
	itema.fun2();
	return 0;
}