C++中修改由const修饰的私有属性

#include <iostream>

using std::cout;
using std::endl;

class A
{
private:
    const int test1;
public:

    int test2;
    A():test1(10)
    {
        test2 = 20;
    }
    void print()
    {
        cout << "This is test1 :" << test1 << endl;
        cout << "This is test2 :" << test2 << endl << endl;
    }
};

int
main(int argc, char **argv)
{
    int *test3;
    A t;
    t.print();
    test3 = &t.test2;
    test3--;
    *test3 = 40;
    t.print();
}