为什么我用vs2022运行会报错，而我用vc++6.0运行就不会

Question

#include
using namespace std;

class A
{
private://私有
int x, y;
public:
A(int x1)
{
x = x1;
}
A()
{
cout << "正在执行" << endl;
}

A(int x1, int y1)
{
    x = x1;
    y = y1;
}
A(A& m)
{
    m.x = m.x * 10;
    m.y = m.y * 10;
    x = m.x;
    y = m.y;
}

void setx(int x1)
{
    x = x1;
}

void printA()
{
    cout << "x=" << x << endl;
}
void printA2()
{
    cout << "x=" << x << "y=" << y << endl;
}

};

void main()
{
A a1(10);
a1.printA();
A a2;

A a3(100, 200);
a3.printA2();
A as[3];
A at[3] = { A(11,22),A(33,44),A(55,66) };
at[0].printA2();
at[1].printA2();
at[2].printA2();
A a4(a3);
a4.printA2();

}