C++ 动态分配对象数组

#include<iostream>
using namespace std;

class MyClass{
int x, y;
public:
MyClass(){}
void setvalue(int x1, int y1){x=x1; y=y1;}
void display()
{
cout<<"("<<x<<","<<y<<")"<<endl;
}
};

int main()
{
MyClass *p=new MyClass[3];
p[0].setvalue(1,2);
p[1].setvalue(2,3);
p[2].setvalue(3,4);
p[0].display();
p[1].display();
p[2].display();
delete[3] p;
return 0;
}