为了方便在c++中完成
#include<stdio.h>
#include<malloc.h>
#include<assert.h>
typedef int datatype;
typedef struct SingleLinkList
{
datatype _data;
SingleLinkList *_nextlist;
}SingleLinkList;
void PrintList(SingleLinkList* phead)
{
SingleLinkList *cur=phead;
while (cur!=NULL)
{
printf("%d", cur->_data);
cur = cur->_nextlist;
}
}
SingleLinkList * BuyNote(datatype x)
{
SingleLinkList *tmp;
tmp = (SingleLinkList*)malloc(sizeof(SingleLinkList));
tmp->_data = x;
tmp->_nextlist = NULL;
return tmp;
}
void PushFrount(SingleLinkList* &phead, datatype x)
{
if (phead == NULL)
{
phead = BuyNote(x);
}
else
{
SingleLinkList *tmp;
tmp = BuyNote(x);
tmp->_nextlist = phead;
phead = tmp;
}
}
void PushTail(SingleLinkList* &phead ,datatype x)
{
assert(phead);
if (phead == NULL)
{
phead = BuyNote(x);
}
else
{
SingleLinkList *cur = phead;
while (cur->_nextlist != NULL)
{
cur = cur->_nextlist;
}
SingleLinkList *tmp = BuyNote(x);
cur->_nextlist = tmp;
}
}
void PopFront(SingleLinkList* &phead)
{
assert(phead);
if (phead == NULL)
{
printf("没有要删除的");
}
else if (phead->_nextlist == NULL)
{
SingleLinkList *tmp = phead;
phead = NULL;
free(tmp);
}
else
{
SingleLinkList *cur = phead;
phead = phead->_nextlist;
free(cur);
}
}
void PopTail(SingleLinkList* &phead)
{
assert(phead);
if (phead == NULL)
{
printf("没有要删除的");
}
else if (phead->_nextlist == NULL)
{
free(phead);
phead = NULL;
}
else
{
SingleLinkList *cur = phead;
while (cur->_nextlist->_nextlist != NULL)
{
cur = cur->_nextlist;
}
SingleLinkList *tmp = cur->_nextlist->_nextlist;
free(tmp);
cur->_nextlist = NULL;
}
}
SingleLinkList *find(SingleLinkList* &phead, datatype x)
{
assert(phead);
SingleLinkList *tmp = phead;
while (tmp)
{
if (tmp->_data == x)
{
return tmp;
}
tmp = tmp->_nextlist;
}
printf("没有抱歉");
return 0;
}
void Erase(SingleLinkList* &phead,datatype x)
{
assert(phead);
SingleLinkList *tmp = phead;
if (tmp->_data == x)
{
free(tmp);
phead =NULL;
}
else if ((tmp->_nextlist->_data == NULL) && tmp->_nextlist->_nextlist == NULL)
{
SingleLinkList *ret = tmp->_nextlist;
free(ret);
tmp->_nextlist = NULL;
}
while (tmp->_nextlist)
{
if (tmp->_nextlist->_data == x)
{
SingleLinkList *ret = tmp->_nextlist;
tmp->_nextlist = ret->_nextlist;
free(ret);
}
tmp = tmp->_nextlist;
}
}
void Insert(datatype x, SingleLinkList * &pos)
{
assert(pos);
SingleLinkList *ret = BuyNote(x);
SingleLinkList *tmp = pos;
if (tmp->_nextlist == NULL)
{
tmp->_nextlist = ret;
ret->_nextlist = NULL;
}
ret->_nextlist = tmp->_nextlist;
tmp->_nextlist = ret;
}
SingleLinkList * Resever(SingleLinkList * &phead)
{
assert(phead);
if (phead->_nextlist == NULL)
{
return phead;
}
else if (phead->_nextlist->_nextlist == NULL)
{
SingleLinkList *tmp = phead->_nextlist;
tmp->_nextlist = phead;
phead->_nextlist = NULL;
return tmp;
}
else
{
SingleLinkList *cur = phead;
SingleLinkList *tmp;
SingleLinkList *newphead=NULL;
while (cur)
{
tmp = cur;
cur = cur->_nextlist;
tmp->_nextlist = newphead;
newphead = tmp;
}
return newphead;
}
}
SingleLinkList *MidList(SingleLinkList* &phead)
{
assert(phead);
SingleLinkList *slowstratlist = phead;
SingleLinkList *faststratlist = phead;
if (phead->_nextlist->_nextlist == NULL)
{
return phead;
}
else
{
while (faststratlist->_nextlist)
{
slowstratlist = slowstratlist->_nextlist;
faststratlist = faststratlist->_nextlist->_nextlist;
}
return slowstratlist;
}
}
int main()
{
Test1();
}
