C++如何声明指针

// pointer.cpp

#include < iostream>
int main()
{
using namespace std;
int updates = 6;
int * p_updates;
p_updates = &updates;

cout << "Values : updates = " << updates;
cout << ",*p_updates = " << *p_updates << endl;

cout << "Addresses : &updates = " << &updates;
cout << ", p_updates = " << p_updates << endl;

*p_updates = *p_updates + 1;
cout << "Now updates = " << updates << endl;
return 0;

}

输出：
Values : updates = 6,*p_updates = 6
Addresses : &updates = 00CFFCBC, p_updates = 00CFFCBC
Now updates = 7