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´ÓÕâÁ½¸ö²Ù×÷ÖÐѧϰµ½Á´±íµÄ»ù±¾Ó÷¨¡£
1. Create
   Create() ÊÇÒ»¸öÁ´±í»ù´¡£¬Ö»Óн¨Á¢ºÃÁ´±í²ÅÄܶÔËü½øÐÐÏàÓ¦µÄ²éÕÒ£¬É¾³ý µÈ¡£
  »ù±¾Ëã·¨£º
  1.³õʼ»¯
     head=NULL;
     ls=new test£»
    cin>>ls->num;
    Í·½áµãÖ¸ÏòNULL£¬ ´´½¨Ò»¸ö½Úµã£¬ÊäÈënum¡£
   le £ºÕâ¸öÖ¸ÕëÓÃÓڼǼ×îºóÒ»¸öÔÚÁ´±íÉϵĽڵ㣬·Ç³£useful.
 2.½øÈëÑ­»·£¬Ìõ¼þÊÇnum!=0.
    1) ÅжÏhead==NULL,
         Èç¹ûΪÕ棬±íÃ÷Á´±íΪ¿Õ£¬
           Ôò½«½ÚµãÁ¬½Óµ½headÉÏ¡£
        ·ñÔò½«½ÚµãÁ¬µ½×îºóÒ»¸ö½ÚµãÉÏ¡£
    2)  ΪºóÃæµÄÑ­»·×ö×¼±¸
          leÇ°ÒÆ:le=ls;
          ls ¿ª±Ùнڵ㣬¸³Öµ: ls=new test; cin>>ls->num.
  3.ÊÕβ
    ÔÚ֮ǰ¶à¿ª±Ù³öÒ»¸ö½Úµã£¬Òª½«Æäɾ³ý£¬ÁíÍâ¾ÍÊÇleÊÇÖ¸Ïò×îºóÒ»¸ö½ÚµãµÄ
£¬ËùÒÔ½«le->next=NULL.
£¨´ËËã·¨»¹ÓиĽøµÄµØ·½£¬ÄǾÍÊÇ¿ÉÒÔÏÈÅжÏnumÊÇ·ñΪ0 ÔÚ¾ö¶¨ÊÇ·ñ¿ª±Ù£©
struct test
{
int num;
test * next;
};
test * head;
test * create()
{
head=NULL;
test * ls,le;
ls=new test;
cin>>ls->num;
le=ls;
while(ls->num!=0)
{
if(head==NULL)
{
head=ls;
}
else{
le->next=ls;
}
le=ls;
ls=new test;
cin>>ls->num;
}
le->next=NULL;
delete ls;
return head;
}
  2. Delete
 Delete ÊÇÔÚ¸ø¶¨Ò»¸öÁ´±íµÄÍ·½áµãµÄÖ¸ÕëºÍҪɾ³ýµÄÒ»¸öÊý£¬½ø¶ø¶ÔÆäɾ³ý¡£
»ù±¾Ëã·¨ÈçÏ£º
 ÓÉÓÚɾ³ýµÄʱºòÒª¿¼ÂÇÈýÖÖÇé¿ö£º
   1. Èç¹ûheadΪ¿Õ£¬Ö±½Ó·µ»Ø
   2.Èç¹ûɾ³ýµÄΪÊ׽ڵ㣬ÔòÒª½«´Î½ÚµãµÄµØÖ··µ»Ø¸øhead
   3.ʣϵÄÇé¿ö¾ÍÊÇÖмäºÍĩβµÄ½Úµ


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1.int *p1 = *(int **)p2;
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