C++点和箭头操作符用法区别

#inlclude <iostream>
using namespace std;

class A
{
public:
int x;
int y;
};

int main()
{
A a;
a.x=100;        //对象用点访问
// a->y=100;     //error
A* pa = new A;
pa->y=200;      //对象指针用箭头
// pa.x=100;     //error
　　　　delete pa;
return 0;
}