c实现双向链表代码

    xiaoxiao2021-03-25  109

    双向链表:next指向下一个节点,front指向前一个节点

    双链表原理图:

    // main.c // 双链表 // Created by fzl // Copyright © fzl All rights reserved. // #include <stdio.h> #include <stdlib.h> #include <string.h> typedef struct NB { int class; char name[20]; }NB; typedef struct LINK { NB data; struct LINK *front; struct LINK *next; }LINK,*pLINK; /* 创建双链表 */ pLINK createDlist(pLINK head) { if(head==NULL) { head=(pLINK)malloc(sizeof(LINK)); head->front=NULL; head->next=NULL; } return head; } NB getData() { NB nb; printf("请输入信息[班级 姓名]:"); scanf("%d%s",&nb.class,nb.name); return nb; } /** 插入信息:头插, */ pLINK insertData(pLINK head) { if(head==NULL) { head=createDlist(head); } pLINK p=(pLINK)malloc(sizeof(LINK)); p->data=getData(); if(head->next==NULL) { p->next=head->next; head->next=p; p->front=head; return head; } p->next=head->next; head->next->front=p; head->next=p; p->front=head; return head; } /* 打印数据 */ void printData(pLINK head) { if(head==NULL||head->next==NULL) { printf("无信息打印\n"); return; } pLINK temp=head->next; for (; temp!=NULL; temp=temp->next) { printf("[%d %s]----->",temp->data.class,temp->data.name); } printf("NULL\n"); } void deleteData(pLINK head) { if(head==NULL||head->next==NULL) { printf("无信息删除\n"); return; } char name[20]; printf("请输入要删除人的姓名:"); scanf("%s",name); pLINK temp; for (temp=head->next; temp!=NULL; temp=temp->next) { if(strcmp(temp->data.name,name)==0) { pLINK front=temp->front; pLINK next=temp->next; front->next=next; next->front=front; free(temp); return; } } if(temp==NULL) { printf("查无此人\n"); } } int main() { pLINK head=NULL; head=createDlist(head); insertData(head); insertData(head); insertData(head); printData(head); deleteData(head); printData(head); return 0; }
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