C语言之双向链表详解及实例代码

#include <stdio.h>
#include <string.h>
#include <stdarg.h>
#include <stdlib.h>


typedef struct Student{
  char name[20];
  int score;
  char phoneNum[14];
} str_student;


typedef struct Node{
  str_student data;
  struct Node *prior;     //指向前驱结点
  struct Node *next;     //指向后继结点
}Node, *DLinkList;


// 初始化一个学生链表
DLinkList initDouLinkList()
{
  Node *L,*p,*r;
  char name[20];
  char phone[14];
  int score;
  L = (Node *)malloc(sizeof(Node));
  L->next = NULL;
  r = L;
  r->next = NULL;


  while(1)
  {
    p = (Node *)malloc(sizeof(Node));
    printf("input name is out exit,input student name:\n");
    scanf("%s",name);
    if (strcmp(name,"out")==0)
    {
      break;
    }
    strcpy(p->data.name, name);
    printf("input student score:");
    scanf("%d",&score);
    p->data.score = score;
    printf("input student phone:");
    scanf("%s",phone);
    strcpy(p->data.phoneNum, phone);


    p->next = r->next;
    r->next = p;
    r = p;


  }
  r->next = NULL;
  return L;
}


//添加学生信息
DLinkList insertDouLinkListStuent(DLinkList L,int i,char *name, int score,char *phonenum)
{
  DLinkList p,s;
  p = L->next;
  int tempi;
  for(tempi = 1;tempi < i-1; tempi++)
    p = p->next;
  s = (Node *)malloc(sizeof(Node));
  s->data.score = score;
  strcpy(s->data.name,name);
  strcpy(s->data.phoneNum,phonenum);
  s->next = p->next;
  p->next->prior = s;
  s->prior = p;
  p->next = s;


  return L;
}


// 查找学生信息
int findDouLinkListStudent(DLinkList L,char *name)
{
  DLinkList p;
  p = L->next;
  int i = 1;


  while(p != NULL && (strcmp(p->data.name, name)!=0))
  {
    ++i;
    p = p->next;
  }
  if(p == NULL)
    return 0;
  else return i;
}


// 移除一个学生
DLinkList removeDouLinkListStudent(DLinkList L,char *name)
{
  int tempi = 1;
  DLinkList p;
  p = L->next;
  int i =findDouLinkListStudent(L,name);
  while((tempi++) != i && p != NULL)
  {
    p = p->next;
  }
  if(p == NULL)
    printf("no list \n");
  else if(p->next == NULL)
  {
    p->prior->next = NULL;
    free(p);
  }
  else
  {
    p->prior->next = p->next;
    p->next->prior = p->prior;
    free(p);
  }
  return L;
}


// 铺助打印信息
void printfInfo(DLinkList L)
{
  DLinkList p;
  p = L->next;
  while (p!=NULL)
  {
    printf("student name %s\n",p->data.name);
    printf("student name %d\n",p->data.score);
    printf("student name %s\n",p->data.phoneNum);
    p=p->next;
  }
}


void main ()
{
  char name2[20]="hanmeimei";
  char phone2[14]="13612345678";


  DLinkList L =initDouLinkList();
  // 2.1 初始化学生双向链表数据
  insertDouLinkListStuent(L,1,name2,99,phone2);
  printfInfo(L);


  // 2.2 查找学生zhangsan
  findDouLinkListStudent(L,'zhangsan');
  printfInfo(L);


  // 2.3 删除学生zhangsan
  removeDouLinkListStudent(L,'zhangsan');
  printfInfo(L);


  // 2.4 添加学生zengteng
  insertDouLinkListStuent(L,9,'zengteng',89,'13643345667');
  printfInfo(L);


}