delete p究竟把p怎么了？是删除p吗？是改变p的指向吗？一切答案尽在下面的程序中：（C中的free与C++中的delete类似.）
#include<iostream>
using namespace std;
int main()
{
int *p = new int;
cout << "random *p: " <<*p << endl;
*p = 10;
cout << "the address of p: " << &p << endl;
cout << "the value of p: " << p << endl;
cout << "the value of *p : " << *p << endl;
delete p;
cout << endl;
cout << "---After executing (delete p;)---" << endl;
cout << endl;
cout << "the address of p: " << &p << endl;
cout << "the value of p: " << p << endl;
cout << "the value of *p: " << *p << endl << endl;
return 0;
}
结果为：
random *p: -842150451
the address of p: 0012FF7C
the value of p: 00381F28
the value of *p : 10
---After executing (delete p;)---
the address of p: 0012FF7C
the value of p: 00381F28
the value of *p: -572662307