链表问题大全！！！刚出炉的还热乎呢！！

#include

#include

typedef struct node

{

int nDate;

struct node *pstnext;

}Node;

//链表输出

void output(Node *head)

{

Node *p = head->pstnext;

while(NULL != p)

{

printf("%d ", p->nDate);

p = p->pstnext;

}

printf("\r\n");

}

//链表建立

Node* creat()

{

Node *head = NULL, *p = NULL, *s = NULL;

int Date = 0, cycle = 1;

head = (Node*)malloc(sizeof(Node));

if(NULL == head)

{

printf("分配内存失败\r\n");

return NULL;

}

head->pstnext = NULL;

p = head;

while(cycle)

{

printf("请输入数据且当输入数据为0时结束输入\r\n");

scanf("%d", &Date);

if(0 != Date)

{

s = (Node*)malloc(sizeof(Node));

if(NULL == s)

{

printf("分配内存失败\r\n");

return NULL;

}

s->nDate = Date;

p->pstnext = s;

p = s;

}

else

{

cycle = 0;

}

}

p->pstnext = NULL;

return(head);

}

//单链表测长

void length(Node *head)

{

Node *p = head->pstnext;

int j=0;

while(NULL != p)

{

p = p->pstnext;

j++;

}

printf("%d\r\n", j);

}

//链表按值查找

void research_Date(Node *head, int date)

{

Node *p;

int n=1;

p = head->pstnext;

while(NULL != p && date != p->nDate)

{

p = p->pstnext;

++n;

}

if(NULL == p)

{

printf("链表中没有找到该值");

}else if(date == p->nDate)

{

printf("要查找的值%d在链表中第%d个位置\r\n", date, n);

}

return;

}

//按序号查找

void research_Number(Node *head, int Num)

{

Node *p=head;

int i = 0;

while(NULL != p && i < Num)

{

p = p->pstnext;

i++;

}

if(p == NULL)

{

printf("查找位置不合法\r\n");

}else if(i == 0)

{

printf("查找位置为头结点\r\n");

}else if(i == Num)

{

printf("第%d个位置数据为%d\r\n", i, p->nDate);

}

}

//在指定元素之前插入新结点

void insert_1(Node *head, int i, int Newdate)

{

Node *pre = head, *New = NULL;

int j = 0;

while(NULL != pre && j < i-1)

{

pre = pre->pstnext;

j++;

}

if(NULL == pre || j > i-1)

{

printf("插入位置不存在\r\n");

}else

{

New = (Node*)malloc(sizeof(Node));

if(NULL == New)

{

printf("分配内存失败\r\n");

return;

}

New->nDate = Newdate;

New->pstnext = pre->pstnext;

pre->pstnext = New;

}

}

//在指定元素之后插入新结点

void insert_2(Node *head, int i, int Newdate)

{

Node *pre = head, *New = NULL;

int j = 0;

while(NULL != pre->pstnext && j < i)

{

pre = pre->pstnext;

j++;

}

if(j == i)

{

New = (Node*)malloc(sizeof(Node));

if(NULL == New)

{

printf("分配内存失败\r\n");

return;

}

New->nDate = Newdate;

New->pstnext = pre->pstnext;

pre->pstnext = New;

}else

{

printf("插入位置不存在\r\n");

}

}

//删除第一个结点

void delete_list(Node *head)

{

Node *p = head->pstnext;

head->pstnext = p->pstnext;

free(p);

}

//删除指定结点

void Delete_1(Node *head, int i3)

{

Node *p = head, *pre = NULL;

int j = 0;

while(NULL != p && j < i3)

{

pre = p;

p = p->pstnext;

j++;

}

if(NULL == p)

{

printf("删除位置不存在\r\n");

}else

{

pre->pstnext = p->pstnext;

free(p);

}

}

//指定删除单链表中某个数据，并统计删除此数据的个数

int Delete_2(Node *head, int Delete_date)

{

int count = 0;

Node *p = head, *q;

while(NULL != p->pstnext)

{

q = p->pstnext;

if(q->nDate == Delete_date)

{

p->pstnext = q->pstnext;

free(q);

++count;

}

else

{

p = q;

}

}

return count;

}

//链表逆置

void Reverse_list(Node *head)

{

Node *q, *s;

if(NULL == head->pstnext || NULL == head->pstnext->pstnext)

{

return;

}

q = head->pstnext->pstnext;

head->pstnext->pstnext = NULL;

while(NULL != q)

{

s = q->pstnext;

q->pstnext = head->pstnext;

head->pstnext = q;

q = s;

}

}

//单链表的连接

void connect_list(Node *head, Node *head_New)

{

Node *p = head;

while(NULL != p->pstnext)

{

p = p->pstnext;

}

p->pstnext = head_New->pstnext;

}

void main()

{

int date, num; //待查找数据

int i3; //指定删除元素的位置

int i1, i2, Newdate_1, Newdate_2; //待插入的新数据

int Delete_date, k; //待删除的数据与其个数

Node *Head = NULL; //定义头结点

Node *Head_New = NULL;

//链表建立

Head = creat();

printf("输出建立的单链表\r\n");

output(Head);

//单链表测长

printf("单链表长度为\r\n");

length(Head);

//链表按值查找

printf("请输入待查找的数据\r\n");

scanf("%d", &date);

research_Date(Head, date);

//链表按序号查找

printf("请输入待查找序号\r\n");

scanf("%d", &num);

research_Number(Head, num);

//在指定第i1个元素之前插入新元素Newdate

printf("在指定第i个元素之前插入新元素Newdate");

printf("请输入i与元素且以逗号间隔\r\n");

scanf("%d,%d", &i1, &Newdate_1);

insert_1(Head, i1, Newdate_1);

printf("插入后新链表\r\n");

output(Head);

//在指定第i2个元素之后插入新元素Newdate

printf("在指定第i个元素之后插入新元素Newdate");

printf("请输入i与元素且以逗号间隔\r\n");

scanf("%d,%d", &i2, &Newdate_2);

insert_2(Head, i2, Newdate_2);

printf("插入后新链表\r\n");

output(Head);

//删除链表第一个结点

delete_list(Head);

printf("输出删除后的链表\r\n");

output_list(Head);

//指定删除i3元素

printf("删除元素的位置\r\n");

scanf("%d", &i3);

Delete_1(Head, i3);

printf("删除后新链表\r\n");

output(Head);

//指定删除单链表中某个数据，并统计删除此数据的个数

printf("请输入待删除的元素\r\n");

scanf("%d", &Delete_date);

k = Delete_2(Head, Delete_date);

printf("删除后新链表\r\n");

output(Head);

printf("删除指定元素在链表中的个数为：");

printf("%d\r\n", k);

//单链表逆置

Reverse_list(Head);

printf("逆置后输出\r\n");

output(Head);

//单链表的连接

printf("建立一个新链表\r\n");

Head_New = creat();

printf("输出新链表");

output(Head);

printf("将新链表连接到原来链表的尾部并输出\r\n");

connect_list(Head, Head_New);

output(Head);

return;

}