test

#include<iostream>
using namespace std;


int main()
{
int *p=new int;
cout<<"未初始化的*p和p(int):"<<*p<<" "<<p<<" "<<p-1<<" "<<p+1<<" "<<endl;
*p=20;
cout<<"初始化的*p和p(int):"<<*p<<" "<<p<<" "<<p-1<<" "<<p+1<<" "<<endl;
delete p;
cout<<"删除后的*p和p(int):"<<*p<<" "<<p<<" "<<p-1<<" "<<p+1<<" "<<endl;
long *j=new long;
cout<<"未初始化的*j和j(long):"<<*j<<" "<<j<<" "<<j-1<<" "<<j+1<<" "<<endl;
*j=55;
cout<<"初始化的*j和j(long):"<<*j<<" "<<j<<" "<<j-1<<" "<<j+1<<" "<<endl;
cout<<"初始化的*p和p(int):"<<*p<<" "<<p<<" "<<p-1<<" "<<p+1<<" "<<endl;
p=NULL;
cout<<"NULL后的*p和p(int):"<<p<<" "<<p-1<<" "<<p+1<<" "<<endl;
j=NULL;
cout<<j<<endl;
return 0;
}