#include <iostream>

using namespace std;

void fun1 ( void )
{
  int *p = new int;

  *p = 1;

  delete p;               //遵循1
  p = NULL;
}

void fun2 ( void )
{
  int *p = new int[ 3 ];

  p[ 0 ] = 1;
  p[ 1 ] = 2;
  p[ 2 ] = 3;

  delete[ ] p;            //遵循2
  p = NULL;
}

int main ( void )
{
  fun1 ( );
  fun2 ( );

  return ( 0 );
}