C语言之双向链表
来源：程序员人生 发布时间：2015-01-05 08:49:55 阅读次数：4128次
1，双向链表简介。
双向链表也叫双链表，是链表的1种，它的每一个数据结点中都有两个指针，分别指向直接后继和直接先驱。所以，从双向链表中的任意1个结点开始，都可以很方便地访问它的先驱结点和后继结点。1般我们都构造双向循环链表。
2，例子要求：完成双向链表的插入、删除和查找，将学生管理系统使用的数组，以双向链表的方式实现，能够支持无穷制的学生人数的增删改查和保存。
3，代码实现。#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; //指向先驱结点 struct Node *next; //指向后继结点}Node, *DLinkList;// 初始化1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:
"); 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 < i⑴; 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1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
"); 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
",p->data.name); printf("student name %d
",p->data.score); printf("student name %s
",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);}
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原博客地址： http://blog.itpub.net/26230597/viewspace⑴386602/?
原作者：黄杉 (mchdba)
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