数据结构代码(用C语言) 单链表的插入和删除

要求单链表的数据域是字符串,且不允许重复的串插入表中;删除操作是根据输入的字符串,先找到相应的节点,然后删除
我就要个单链表的插入和删除,你搞这么复杂,汗!!!

单链表功能大全,嘿嘿
#include <stdio.h>
#include <stdlib.h>

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;
}
//单链表销毁
void destroy_list(Node* head)
{
while (NULL != head)
{
Node* temp = head;
head = head->pstnext;
free(temp);
}
}
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);

//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);
destroy_list(Head);

return;
}
温馨提示:答案为网友推荐,仅供参考
第1个回答  2011-07-06
单链表功能大全,嘿嘿
#include <stdio.h>
#include <stdlib.h>

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;
}
//单链表销毁
void destroy_list(Node* head)
{
while (NULL != head)
{
Node* temp = head;
head = head->pstnext;
free(temp);
}
}
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);

//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);
destroy_list(Head);

return;
}
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第2个回答  2011-07-01
struct A{
char a[20];
struct A *next;
}a;

struct A *apo; //首节点
int charu(struct A *s) //插入
{
struct A p = apo->next;

while(p)
{
if(!strcmp(p->a, s->a))
return 0;
p = p->next;
}
p = apo->next;
s->next = p->next;
p->next = s;

return 1;
}

int shanchu(struct *s) //删除
{
struct A p = apo->next;
struct A m;

m = p;
while(p)
{
if(!strcmp(p->a, s->a))
{
if(p == apo->next) //如果是第一个节点
{
app->next = p->next;
free(p);
}
else
{
m->next = p->next;
free(p);
}
return 0;
}
else
{
m = p;
p = p->next;
}
}
return 1;
}
第3个回答  2016-01-13
 建立一个单链表,实现插入与删除功能的代码如下:
  ///单链表
  #include<iostream>
  using namespace std;
  
  typedef int elemtype; //数据类型模版
  
  struct Lnode //结点
  {
  elemtype data;
  Lnode *next;
  };
  
  ///建表
  void creat_Link(Lnode &head)
  {
  Lnode *p,*q;
  int n;
  p=new Lnode;
  head=p;
  cout<<"输入链表长度:"<<endl;
  cin>>n;
  cout<<"输入数据:"<<endl;
  cin>>p->data;
  q=p;
  for(int i=1;i<=n-1;i++)
  {
  p=new Lnode;
  //cout<<"输入数据:";
  cin>>p->data;
  q->next=p;
  q=p;
  }
  q->next=NULL;
  }
  
  ///表的输出
  void output_Link(Lnode *&head)
  {
  if(head==NULL)
  {cout<<"空链表!"<<endl;
  return;}
  Lnode *q;
  q=head;
  //cout<<"此链表为:";
  while(q!=NULL)
  {
  cout<<q->data<<" ";
  q=q->next;
  }
  cout<<endl;
  }
  
  
  ///表的插入
  void insert_Link(Lnode *&head)
  {
  int i;
  cout<<"输入要插入的位置:";
  
  cin>>i;
  Lnode *q,*iq;
  q=head;
  for(int j=1;j<i;j++)
  {
  iq=q;
  q=q->next;
  }
  
  cout<<"输入插入的数据:";
  Lnode *p;
  p=new Lnode;
  cin>>p->data;
  p->next=iq->next;
  iq->next=p;
  cout<<endl;
  
  }
  
  ///表的数据删除
  void Delete_Link(Lnode *&head)
  {
  cout<<"输入删除的位置:";
  int i;
  cin>>i;
  if(i==1)
  head=head->next;
  else
  {
  Lnode *p,*q;
  q=head;
  for(int j=1;j<i;j++)
  { p=q;
  q=q->next;
  }
  p->next=q->next;
  delete q;
  cout<<endl;
  }
  }
  
  
  int main()
  {
  Lnode *head;
  head=NULL;
  creat_Link(head);
  
  insert_Link(head);
  output_Link(head);
  Delete_Link(head);
  output_Link(head);
  return 0;
  }
  [扩展]
  以“结点的序列”表示线性表称作线性链表(单链表),链表中的数据是以结点来表示的,每个结点的构成:元素(数据元素的映象) + 指针(指示后继元素存储位置),元素就是存储数据的存储单元,指针就是连接每个结点的地址数据。
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2008-10-25 21:30提问者采纳
#include<stdio.h>
#include<malloc.h>
#define LEN sizeof(struct Node)
typedef struct Node
{
int data;
struct Node *next;
}node;
int n;
node *Creat(void)
{
int data;
node *head;
node * p1=(node*)malloc(LEN);
node * p2=(node*)malloc(LEN);
head=NULL;
n=0;
puts("Please input a num:");
scanf("%d",&p1->data);
while(p1->data!=0)
{
n++;
if(n==1)
head=p1;
else
p2->next=p1;
p2=p1;
p1=(node*)malloc(LEN);
scanf("%d",&p1->data);
}
free(p1);
p1=NULL;
p2->next=NULL;
return head;
}
void Print(node *head)
{
node *p;
p=head;
if(head==NULL)
{
printf("No Records?!");
return;
}
else
do
{
printf("%d-->",p->data);
p=p->next;
}while(p!=NULL);
printf("\n");
}
node* Insert(node *head)
{
int data;
node *p0=(node*)malloc(LEN),*p1,*p2;
p1=head;
if(head==NULL)
{
printf("No Records?!");
return NULL;
}
puts("Please input a num to insert:");
scanf("%d",&p0->data);
while(p1->data<p0->data&&p1->next!=NULL)
{
p2=p1;
p1=p1->next;
}
if(p1->data>=p0->data)
{
if(p1==head)
head=p0;
else
p2->next=p0;
p0->next=p1;
}
else
printf("Not find!\n");
return head;
}
node *Delete(node *head)
{
node *p0,*p1,*p2,*p3;
p0=(node*)malloc(LEN);
if(head==NULL)
{
printf("No Reacord?!");
return NULL;
}
puts("Please input a num to delete:");
scanf("%d",&p0->data);
while(head->data==p0->data)
head=head->next;
p1=head;
if(head->next!=NULL)
do
{
p2=p1;
p1=p1->next;
while(p1!=NULL&&p1->data==p0->data)
{
p3=p1;
p1=p1->next;
free(p3);
}
p2->next=p1;
}while(p1!=NULL);
return head;
}
int main()
{
node *head;
head=Creat();
Print(head);
head=Insert(head);
Print(head);
head=Delete(head);
Print(head);
return 0;
}
Please input a num:
2 3 4 5 6 0
2-->3-->4-->5-->6-->
Please input a num to insert:
4
2-->3-->4-->4-->5-->6-->
Please input a num to delete:
5
2-->3-->4-->4-->6-->
Press any key to continue
VC6.0