下面是关于类A的一个定义，请输出下面结果

using namespace std;
class A{
private:
int x,y;
public:
void ask1(int a=0,int b=0);
int ask2();
int ask3();
};
void A::ask1(int a,int b){x=a;y=b;}
int A::ask2()
{
if(x>y) return x;
else return y;
}
int A::ask3(){cout<<"x="<<x<<",y="<<y<<endl;}
int main()
{
A a;
a.ask1();
a.ask3();
cout<<a.ask2()<<endl;;
a.ask1(3,5);
a.ask3();
cout<<a.ask2()<<endl;
}

代码：

#include<iostream>
using namespace std;
class A {
private:
    int x, y;
public:
    void ask1(int a = 0, int b = 0);
    int ask2();
    void ask3();
};
void A::ask1(int a, int b) { x = a; y = b; }
int A::ask2()
{
    if (x > y) return x;
    else return y;
}
void A::ask3() { cout << "x=" << x << ",y=" << y << endl; }
int main()
{
    A a;
    a.ask1();
    a.ask3();
    cout << a.ask2() << endl;;
    a.ask1(3, 5);
    a.ask3();
    cout << a.ask2() << endl;
}

结果：