线性表

[TOC]

第二章

时间和空间复杂度

image-20230322151152567

image-20230322151451180

时间复杂度

  1. 使用big O计数法

  2. 实例

    • O(1) 常量级的算法

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      int a=0;
      int b=0;
      int c=0;
      a=b;
      a=c;
      b=c;
      //就算重复1000000+都是一个常量

    • O(n) 

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      for(int i=0;i<n;++i){
          //代码
      }

    • O(logN) 

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      while(i<n){
          i*=2;
      }

      image-20230322182248288

    • O(NM)

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      for(int i=0;i<n;i++){
          for(int j=0;j<m;++j){
              //
          }
      }

空间复杂度

  1. 实例

    • O(1)

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      int a=0;
      int b=0;

    • O(n) new 一个维数组

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      int[] newArray = new int[n];
      for(int i=0;i<n;++i){
          newArray[i]=i;
      }

    • O(n*n) new 二个维数组

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      int [][] newArray = new int[n][n];

线性表（案例分析）

  1. 线性表具有同一种特性的数据元素的一个有限的序列

    ![image-20230322183519529](C:\Users\12414\OneDrive - cuit.edu.cn\学\笔记\数据结构和算法\数据结构和算法.assets\image-20230322183519529.png)

  2. 注意

    • 下标由1开始

  3. 基本代码

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    const int MAX =100;
    //顺序结构
    typedef struct List{
        ELETMENT List[MAX];
        int listLenth;
    }List;

    image-20230322155844508

    image-20230322155956690

  4. 缺点

    • 存储空间分配不灵活
    • 空间复杂度高

线性表的类型定义

  1. 线性表的操作

    • 线性表的初始化（IniList）![image-20230322191953037](C:\Users\12414\OneDrive - cuit.edu.cn\学\笔记\数据结构和算法\数据结构和算法.assets\image-20230322191953037.png)

    • 线性表的销毁（DestroyList）

      连本身都没有了

      ![image-20230322192004208](C:\Users\12414\OneDrive - cuit.edu.cn\学\笔记\数据结构和算法\数据结构和算法.assets\image-20230322192004208.png)

    • 线性表的清楚（ClearList）

      还存在，但是是一个空表

      ![image-20230322192014702](C:\Users\12414\OneDrive - cuit.edu.cn\学\笔记\数据结构和算法\数据结构和算法.assets\image-20230322192014702.png)

    • 判断线性表是否为空（ListEmpty）

      ![image-20230322192029109](C:\Users\12414\OneDrive - cuit.edu.cn\学\笔记\数据结构和算法\数据结构和算法.assets\image-20230322192029109.png)

    • 求线性表的长度（ListLength）

      ![image-20230322192050448](C:\Users\12414\OneDrive - cuit.edu.cn\学\笔记\数据结构和算法\数据结构和算法.assets\image-20230322192050448.png)

    • 获取元素(GetElem)

      ![image-20230322190529314](C:\Users\12414\OneDrive - cuit.edu.cn\学\笔记\数据结构和算法\数据结构和算法.assets\image-20230322190529314.png)

    • 查找元素（LocateElem）

      ![image-20230322190615757](C:\Users\12414\OneDrive - cuit.edu.cn\学\笔记\数据结构和算法\数据结构和算法.assets\image-20230322190615757.png)

    • 求一个元素的前驱（PrioElem）

      ![image-20230322190742641](C:\Users\12414\OneDrive - cuit.edu.cn\学\笔记\数据结构和算法\数据结构和算法.assets\image-20230322190742641.png)

    • 获得一个元素的后继（NextElem）

      ![image-20230322190833997](C:\Users\12414\OneDrive - cuit.edu.cn\学\笔记\数据结构和算法\数据结构和算法.assets\image-20230322190833997.png)

    • 插入一个元素（ListInsert）

      ![image-20230322191334889](C:\Users\12414\OneDrive - cuit.edu.cn\学\笔记\数据结构和算法\数据结构和算法.assets\image-20230322191334889.png)

    • 删除一个元素（ListDelete）

      ![image-20230322191749620](C:\Users\12414\OneDrive - cuit.edu.cn\学\笔记\数据结构和算法\数据结构和算法.assets\image-20230322191749620.png)

    • 遍历线性表（LIstTraverse）

      ![image-20230322191844657](C:\Users\12414\OneDrive - cuit.edu.cn\学\笔记\数据结构和算法\数据结构和算法.assets\image-20230322191844657.png)

线性表的存储结构

顺序结构

  1. 定义：把逻辑上相邻的数据元素存储在物理相邻的存储单元

    ![image-20230322192505711](C:\Users\12414\OneDrive - cuit.edu.cn\学\笔记\数据结构和算法\数据结构和算法.assets\image-20230322192505711.png)

线性表的顺序表示和实现

  1. 实现：

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     //基本模板
    /*
    #define  SIZE 100
    typedef struct{
        ElemType elem[SIZE];
        int length;
    }SqList;
     */

    //int 型
    #define SIZE 100
    typedef struct{
        int intElem[SIZE];
        int length;
    }intList;

    //int double

    typedef struct{
        int intElem;
        double doubleElem;
    }Polynomial;

    typedef struct{
        Polynomial * PPolynomial;
        int length;
    }PolynomialList;


    //struct
    typedef struct{
        char* name;
        char* author;
        float price;
        int num;
    }Book;

    typedef struct{
        Book* pBook;
        int length;
    }BookList;


类C语言相关操作

  1. ElemType 元素

  2. C语言动态内存分配

  • malloc: 开辟连续的地址空间

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    intList *pIntList=(intList*) malloc(sizeof (intList)*SIZE);
    free(pIntList);

线性表的顺序存储

![image-20230323091558306](C:\Users\12414\OneDrive - cuit.edu.cn\学\笔记\数据结构和算法\数据结构和算法.assets\image-20230323091558306.png)

  1. 代码示例

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

    #define status int
    #define OK 1
    #define ERROR -1
    #define true 1
    #define false 0
    #define ElemType char
    #define SIZE 100

    typedef struct {
        ElemType *elem;
        int length;
    } IntList;

    status initList_Sq(IntList *list);

    status destroyList(IntList *list);

    status clearList(IntList *list);

    status getListLength(IntList *list);

    status getElem(IntList *list, int i, ElemType *e);

    status isEmpty(IntList *list);

    status locateElem(IntList *list, ElemType e);

    status listInsert(IntList *list, int s, ElemType e);

    status listDelete(IntList *list, int s, ElemType *e);

    int main() {
        ElemType *e;
        IntList *list = (IntList *) malloc(sizeof(IntList));
        //初始化
        if (initList_Sq(list) != 1) {
            printf("ERROR\n");
            exit(ERROR);
        }
        for (int i = 0; i < 26; ++i) {
            list->elem[i] = 'A' + i;
            list->length++;
        }
        for (int i = 0; i < list->length; ++i) {
            printf(" %c ", list->elem[i]);
        }

        clearList(list);
        printf("\n%s\n", isEmpty(list) ? "true" : "false");

        for (int i = 0; i < 26; ++i) {
            list->elem[i] = 'A' + i;
            list->length++;
        }

        printf("\n%d\n", getListLength(list));
        getElem(list, 4, e);
        printf("\n%c\n", *e);
        printf("%d\n", locateElem(list, 'd'));
        printf("%d\n", locateElem(list, 'D'));
        listInsert(list, 5, '5');

        for (int i = 0; i < list->length; ++i) {
            printf(" %c ", list->elem[i]);
        }
        printf("\n");
        listDelete(list,5,e);
        printf("%c\n",*e);
        printf("%s",list->elem);

        listDelete(list,26,e);
        printf("\n%c\n",*e);
        printf("%s",list->elem);

        destroyList(list);
        return 0;
    }
    //删除
    status listDelete(IntList *list, int s, ElemType *e) {
        if (s < 1 || s > list->length) {
            return ERROR;
        }
        *e=list->elem[s-1];
        for (int i = s - 1; i < list->length - 1; ++i) {
            list->elem[i] = list->elem[i + 1];
        }
        list->elem[--list->length] = 0;
        return OK;
    }

    //插入
    status listInsert(IntList *list, int s, ElemType e) {
        if (s > SIZE || s < 1) {
            return ERROR;
        }
        for (int i = list->length - 1; i >= s - 1; --i) {
            list->elem[i + 1] = list->elem[i];
        }
        list->elem[s - 1] = e;
        list->length++;
        return OK;
    }

    //顺序查找空间复杂度为  O(n)
    status locateElem(IntList *list, ElemType e) {
        for (int i = 0; i < list->length; ++i) {
            if (e == list->elem[i]) {
                return i + 1;
            }
        }
        return 0;
    }

    status getElem(IntList *list, int i, ElemType *e) {
        if (i < 0 || i > list->length) {
            return ERROR;
        }
        *e = list->elem[i - 1];
        return OK;
    }

    status getListLength(IntList *list) {
        if (!list) {
            return ERROR;
        }
        return list->length;
    }

    status isEmpty(IntList *list) {
        if (list->length == 0) {
            return true;
        }
        return false;
    }

    status clearList(IntList *list) {
        memset(list->elem, 0, sizeof(list->elem));
        list->length = 0;
        return true;
    }

    status destroyList(IntList *list) {
        if (list) free(list);
        if (!list) return OK;
        return ERROR;
    }

    status initList_Sq(IntList *list) {
        list->elem = (ElemType *) malloc(sizeof(ElemType) * SIZE);
        if (!list) return ERROR;
        list->length = 0;
        return OK;
    }

线性表的链式储存

  1. 指针的组成：数据域和指针域（指向下一个）

  2. 链表的类型

    • 单链表：

      只有一个指针域的链表

    • 双链表：

      有两个指针域的链表

    • 循环链表：

      首尾相连的链表

  3. 空表的判断：

    看一下头指针的是否为NULL,如果为NULL则是空链表

  4. 设置头节点的好处：

    1. 便于首元节点的处理
    2. 处理空表和非空表就一样了

    ![image-20230324170004103](C:\Users\12414\OneDrive - cuit.edu.cn\学\笔记\数据结构和算法\数据结构和算法.assets\image-20230324170004103.png)

  5. 存取元素的方法叫做顺序存取法

    ![image-20230324170213582](C:\Users\12414\OneDrive - cuit.edu.cn\学\笔记\数据结构和算法\数据结构和算法.assets\image-20230324170213582.png)

    顺序表是随机存取

  6. 链表的操作

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    //链表
    #include "stdio.h"
    #include "stdlib.h"

    #define status int
    #define OK 1
    #define ERROR (-1)
    #define true 1
    #define false 0
    #define ElemType char


    typedef struct node {
        ElemType date;
        struct node *next;
    } node, *linkList;
    //使用node表示节点
    //使用linkList表示链表的
    status destroyList(linkList headNode);

    status printfNode(linkList headNode);

    status initList(linkList headNode);

    status isEmpty(linkList headNode);

    status clearList(linkList headNode);

    status listLength(linkList headNode);

    int getElemSub(linkList headNode, const char e);

    status getElemBySub(linkList headNode, const int sub, ElemType *e);

    node *getElemPoint(linkList headNode, const char e);

    status insertNode(linkList headNode, int sub, ElemType e);

    status deleteNode(linkList headNode, int sub);

    int main() {
        linkList charListHead = NULL;
        char e;
        int sub;
        //创建头节点
        charListHead = (linkList) malloc(sizeof(node));
        charListHead->next = NULL;
        charListHead->date = '0';
        //初始化链表
        initList(charListHead);

        printfNode(charListHead);
        printf("\n%s", isEmpty(charListHead) ? "true" : "false");

        //清空链表
        clearList(charListHead);
        printf("\n%s\n", isEmpty(charListHead) ? "true" : "false");

        initList(charListHead);
        printfNode(charListHead);
        printf("\n%d", listLength(charListHead));

        printf("\n%d", getElemSub(charListHead, 'e'));

        getElemBySub(charListHead, 5, &e);
        printf("\n%c", e);
        printf("\n%p", getElemPoint(charListHead, 'e'));

        printf("\n%d", insertNode(charListHead, 1, 'a'));
        printf("\n%d", getElemSub(charListHead, 'a'));
        getElemBySub(charListHead, 2, &e);
        printf("\n%c", e);



        printf("\n%d\n", listLength(charListHead));
        printfNode(charListHead);

        sub = 28;
        deleteNode(charListHead, sub);
        printf("\n");
        printfNode(charListHead);
        printf("\n%d", getElemSub(charListHead, 'Z'));
        return 0;
    }
    //

    //删除
    status deleteNode(linkList headNode, int sub) {
        node *moveNode = headNode;
        node* temNode=NULL;
        int i=1;
        while(i<sub&&moveNode->next!=NULL){
            moveNode=moveNode->next;
            i++;
        }
        if(i>=sub||moveNode==NULL){
            return ERROR;
        }
        temNode=moveNode->next;
        moveNode->next=moveNode->next->next;
        free(temNode);
        return OK;

    }

    //插入元素
    status insertNode(linkList headNode, int sub, ElemType e) {
        node *moveNode = headNode;
        node *temNode = (node *) malloc(sizeof(node));
        temNode->next = NULL;
        temNode->date = e;
        if (headNode == NULL || sub >= listLength(headNode)) {
            free(temNode);
            return ERROR;
        }
        int tem = 1;
        while (tem != sub) {
            moveNode = moveNode->next;
        }
        temNode->next = moveNode->next;
        moveNode->next = temNode;
        return OK;
    }


    //取出元素返回地址
    node *getElemPoint(linkList headNode, const ElemType e) {
        node *moveNode = headNode->next;
        while (moveNode != NULL && moveNode->date != e) {
            moveNode = moveNode->next;
        }
        return moveNode;
    }


    //通过下标取出元素
    status getElemBySub(linkList headNode, const int sub, ElemType *e) {
        node *moveNode = headNode->next;
        int tem = 1;
        while (tem != sub) {
            moveNode = moveNode->next;
            tem++;
        }
        *e = moveNode->date;
        return OK;
    }

    //取出元素通过下标
    int getElemSub(linkList headNode, const ElemType e) {
        node *moveNode = headNode->next;
        int sub = 1;
        while (moveNode && moveNode->date != e) {
            moveNode = moveNode->next;
            sub++;
        }
        if (moveNode == NULL) {
            return ERROR;
        } else {
            return sub;
        }
    }


    //求链表的长度
    status listLength(linkList headNode) {
        int i = 1;
        node *moveNode = headNode->next;
        if (headNode->next == NULL) {
            return ERROR;
        }
        while (moveNode != NULL) {
            i++;
            moveNode = moveNode->next;
        }
        return i-1;
    }


    //清空链表
    status clearList(linkList headNode) {
        node *moveNode = NULL;
        node *deleteNode = NULL;
        moveNode = headNode->next;
        if (headNode->next = NULL) {
            return ERROR;
        }
        while (moveNode != NULL) {
            deleteNode = moveNode;
            moveNode = moveNode->next;
            free(deleteNode);
        }
        headNode->next = NULL;
        return OK;
    }

    //判断是否为空
    status isEmpty(linkList headNode) {
        if (headNode->next == NULL) {
            return true;
        }
        return false;
    }

    //打印
    status printfNode(linkList headNode) {
        node *moveNode = headNode->next;
        if (headNode->next == NULL) {
            return ERROR;
        }
        while (moveNode != NULL) {
            printf(" %c ", moveNode->date);
            moveNode = moveNode->next;
        }
        return OK;
    }

    //删除，包括头节点
    status destroyList(linkList headNode) {
        if (headNode == NULL) {
            return ERROR;
        }
        node *moveNode;
        node *deleteNode;
        moveNode = headNode;
        while (moveNode) {
            deleteNode = moveNode;
            moveNode = moveNode->next;
            free(deleteNode);
        }
        return OK;
    }

    //初始化
    status initList(linkList headNode) {
        node *moveNode = headNode;
        for (int i = 0; i < 26; ++i) {
            node *nextNode = (node *) malloc(sizeof(node));
            nextNode->next = NULL;
            nextNode->date = 'A' + i;
            moveNode->next = nextNode;
            moveNode = nextNode;
        }
        return OK;
    }

  7. 链表操作的时间和空间复杂度

    • 查找 O(n)

    • 插入和删除 O(1)

      理由是，插入和删除都是在一瞬间发生的事，不包括前面的查找

      所以在查找的时间复杂度为 O(n);

  8. 链表初始化的方式

    • 头插法

      意思是每次都是从头节点后面一位插入数据

      这个是反循序的

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      status initList(linkList headNode) {
          for (int i = 0; i < 26; ++i) {
              node* temNode=(node*)malloc(sizeof(node));
              if(temNode==NULL){
                  return ERROR;
              }
              temNode->date='a'+i;
              temNode->next=headNode->next;
              headNode->next=temNode;
          }
          return OK;
      }

    • 尾插法

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      //初始化
      status initList2(linkList headNode) {
          node *moveNode = headNode;
          for (int i = 0; i < 26; ++i) {
              node *nextNode = (node *) malloc(sizeof(node));
              nextNode->next = NULL;
              nextNode->date = 'A' + i;
              moveNode->next = nextNode;
              moveNode = nextNode;
          }
          return OK;
      }

  9. 问题代码

    • 为什么将头节点放进函数malloc,在main函数中，头节点却是空？
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    #include "stdio.h"
    #include "stdlib.h"

    #define status int
    #define OK 1
    #define ERROR (-1)
    #define true 1
    #define false 0
    #define ElemType char


    typedef struct node {
        ElemType date;
        struct node *next;
    } node, *linkList;

    status destroyList(linkList headNode);

    status initList(linkList headNode);

    status printfNode(linkList headNode);

    int main() {
        linkList headNode = NULL;
        initList(headNode);
        printfNode(headNode);
        destroyList(headNode);
        return 0;
    }

    status initList(linkList headNode) {
        headNode = (linkList) malloc(sizeof(node));
        if (headNode == NULL) {
            return ERROR;
        }
        headNode->next = NULL;
        headNode->date = '0';
        node *moveNode = headNode;
        for (int i = 0; i < 26; ++i) {
            node *temNode = (node *) malloc(sizeof(node));
            temNode->date = 'a' + i;
            temNode->next = NULL;
            moveNode->next = temNode;
            moveNode = temNode;
        }
        return OK;
    }


    //打印
    status printfNode(linkList headNode) {
        node *moveNode = headNode->next;
        if (headNode->next == NULL) {
            return ERROR;
        }
        while (moveNode != NULL) {
            printf(" %c ", moveNode->date);
            moveNode = moveNode->next;
        }
        return OK;
    }

    //删除，包括头节点
    status destroyList(linkList headNode) {
        if (headNode == NULL) {
            return ERROR;
        }
        node *moveNode;
        node *deleteNode;
        moveNode = headNode;
        while (moveNode) {
            deleteNode = moveNode;
            moveNode = moveNode->next;
            free(deleteNode);
        }
        return OK;
    }

    原因：

    C语言的传参本质上都是传值，也就是拷贝传参，普通变量拷贝的普通的值，指针变量拷贝的是指针

    具体参考：深入理解C语言函数传参方式 深入理解C语言函数传参方式_c 为什么是一个一个传参的_amcomputer的博客-CSDN博客](https://blog.csdn.net/qq_39463175/article/details/115566613))

    所以修改后的代码是：

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    #include "stdio.h"
    #include "stdlib.h"

    #define status int
    #define OK 1
    #define ERROR (-1)
    #define true 1
    #define false 0
    #define ElemType char

    typedef struct node {
        ElemType date;
        struct node *next;
    } node, *linkList;

    status initList(linkList *headNode);

    status printfNode(linkList headNode);

    status destroyList(linkList headNode);

    int main() {
        linkList headNode = NULL;
        initList(&headNode);
        printfNode(headNode);
        destroyList(headNode);
        return 0;
    }

    status initList(linkList* headNode) {
        (*headNode)=(linkList)malloc(sizeof(node));
        if((*headNode)==NULL){
            return ERROR;
        }
        (*headNode)->next=NULL;
        (*headNode)->date='0';
        node* moveNode=(*headNode);
        for (int i = 0; i < 26; ++i) {
            node* temNode=(node*)malloc(sizeof(node));
            temNode->next=NULL;
            temNode->date='A'+i;
            moveNode->next=temNode;
            moveNode=moveNode->next;
        }
        return true;
    }

    //打印
    status printfNode(linkList headNode) {
        node *moveNode = headNode->next;
        if (headNode->next == NULL) {
            return ERROR;
        }
        while (moveNode != NULL) {
            printf(" %c ", moveNode->date);
            moveNode = moveNode->next;
        }
        return OK;
    }

    //删除，包括头节点
    status destroyList(linkList headNode) {
        int num = 0;
        if (headNode == NULL) {
            return ERROR;
        }
        node *moveNode;
        node *deleteNode;
        moveNode = headNode;
        while (moveNode != NULL) {
            num++;
            deleteNode = moveNode;
            moveNode = moveNode->next;
            free(deleteNode);
            deleteNode = NULL;
        }
        headNode = NULL;
        printf("%d", num);
        return OK;
    }

循环链表

  1. 最后一个节点指向首节点

  2. 因为没有最后一个节点为空，所以我们在遍历的时候，我们需要判断等不等于头节点

  3. 使用尾指针更加的方便（更快的操作末节点，头节点和a1）

  4. 简单的代码示例

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    #include "stdio.h"
    #include "stdlib.h"

    #define status int
    #define OK 1
    #define ERROR (-1)
    #define true 1
    #define false 0
    #define ElemType char

    typedef struct node {
        ElemType date;
        struct node *next;
    } node, *circularLinkList;

    circularLinkList initList(circularLinkList *headNode);

    status destroyList(circularLinkList headNode);

    status printfList(circularLinkList headNode);

    status combineList(circularLinkList tailNode1, circularLinkList tailNode2);

    int main() {
        circularLinkList headNode1 = NULL;
        circularLinkList headNode2 = NULL;
        circularLinkList tailNode1 = NULL;
        circularLinkList tailNode2 = NULL;
        tailNode1 = initList(&headNode1);
        tailNode2 = initList(&headNode2);
        printfList(headNode1);
        printf("\n");
        combineList(tailNode1,tailNode2);
        printfList(headNode1);
        destroyList(headNode1);
        return 0;
    }

    //将链表2接在链表一的后面，且保留链表一的头节点
    status combineList(circularLinkList tailNode1, circularLinkList tailNode2) {
        if (tailNode1 == NULL || tailNode1 == NULL) {
            return ERROR;
        }
        node *temNode = tailNode1->next;
        tailNode1->next = tailNode2->next->next;
        free(tailNode2->next);
        tailNode2->next=NULL;
        tailNode2->next = temNode;
        return OK;
    }


    status printfList(circularLinkList headNode) {
        if (headNode == NULL) {
            return ERROR;
        }
        node *moveNode = headNode->next;
        while (moveNode != headNode) {
            printf(" %c ", moveNode->date);
            moveNode = moveNode->next;
        }
        return OK;
    }


    status destroyList(circularLinkList headNode) {
        node *moveNode = headNode->next;
        node *deleteNode = NULL;
        if (headNode == NULL) {
            return ERROR;
        }
        while (moveNode != headNode) {
            deleteNode = moveNode;
            moveNode = moveNode->next;
            free(deleteNode);
        }
        free(headNode);
        return OK;
    }

    circularLinkList initList(circularLinkList *headNode) {
        (*headNode) = (node *) malloc(sizeof(node));
        (*headNode)->next = NULL;
        (*headNode)->date = '0';
        char a;
        scanf("%c", &a);
        getchar();
        node *moveNode = (*headNode);
        for (int i = 0; i < 26; ++i) {
            node *temNode = (node *) malloc(sizeof(node));
            temNode->date = a + i;
            temNode->next = NULL;
            moveNode->next = temNode;
            moveNode = moveNode->next;
        }
        moveNode->next = (*headNode);
        return moveNode;
    }

双向链表

  1. 代码示例

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


    #define status int
    #define OK 1
    #define ERROR (-1)
    #define true 1
    #define false 0
    #define ElemType char


    typedef struct node {
        ElemType data;
        struct node *next, *prior;
    } node, *linkList;


    status insertNode(linkList headNode, ElemType data, int sub) {
        if (headNode == NULL || sub < 1) {
            return ERROR;
        }
        node *temNode = (node *) malloc(sizeof(node));
        temNode->data = data;
        node *moveNode = headNode;
        while (--sub) {
            moveNode = moveNode->next;
        }
        moveNode->next->prior = temNode;
        temNode->next = moveNode->next;
        temNode->prior = moveNode;
        moveNode->next = moveNode->next->prior;
        return OK;
    }

    int getLinkLength(linkList headNode){
        if(headNode==NULL){
            return ERROR;
        }
        int i=1;
        node* moveNode=headNode->next;
        while(moveNode!=headNode){
            moveNode=moveNode->next;
            i++;
        }
        return i;
    }


    status deleteNode(linkList headNode, int sub) {
        if (headNode == NULL || sub < 1||sub%getLinkLength(headNode)==0) {
            printf("deleteNode ERROR\n");
            return ERROR;
        }
        node *moveNode = headNode->next;
        while (--sub) {
            moveNode = moveNode->next;
        }
        moveNode->next->prior = moveNode->prior;
        moveNode->prior->next = moveNode->next;
        free(moveNode);
        moveNode=NULL;
        return OK;
    }

    status insertLink(linkList headNode, linkList insertHeadNode) {
        if (headNode == NULL || insertHeadNode == NULL) {
            return ERROR;
        }
        node *temNode = headNode;
        headNode->prior->next = insertHeadNode->next;
        insertHeadNode->next->prior = headNode->prior;
        headNode->prior = insertHeadNode->prior;
        headNode->prior->next = headNode;
        free(insertHeadNode);
        return OK;
    }

    status destroyLink(linkList headNode) {
        if (headNode == NULL) {
            return ERROR;
        }
        node *moveNode = headNode->next;
        node *deleteNode = moveNode;
        int num = 0;
        while (moveNode != headNode) {
            moveNode = moveNode->next;
            free(deleteNode);
            deleteNode = NULL;
            num++;
        }
        free(headNode);
        printf("%d", num);
        headNode = NULL;
        return OK;
    }

    status initLinkList(linkList *headNode) {
        (*headNode) = (node *) malloc(sizeof(node));
        if ((*headNode) == NULL) {
            return ERROR;
        }
        char a;
        (*headNode)->data = '0';
        (*headNode)->next = NULL;
        (*headNode)->prior = NULL;
        node *moveNode = (*headNode);
        printf("a=");
        scanf("%c", &a);
        getchar();
        for (int i = 0; i < 26; ++i) {
            node *temNode = (node *) malloc(sizeof(node));
            temNode->data = a + i;
            moveNode->next = temNode;
            moveNode->next->prior = moveNode;
            moveNode = moveNode->next;
        }
        moveNode->next = (*headNode);
        moveNode->next->prior = moveNode;
        return OK;
    }

    status printNodeACW(linkList headNode) {
        if (headNode == NULL) {
            return ERROR;
        }
        node *moveNode = headNode->prior;
        while (moveNode != headNode) {
            printf(" %c ", moveNode->data);
            moveNode = moveNode->prior;
        }
        printf("\n");
        return OK;
    }

    status printNodeCW(linkList headNode) {
        if (headNode == NULL) {
            return ERROR;
        }
        node *moveNode = headNode->next;
        while (moveNode != headNode) {
            printf(" %c ", moveNode->data);
            moveNode = moveNode->next;
        }
        printf("\n");
        return OK;
    }

    int main() {
        linkList headNode;
        linkList headNode2;
        initLinkList(&headNode);
        initLinkList(&headNode2);
        printNodeCW(headNode);
        printNodeACW(headNode);

        insertLink(headNode, headNode2);
        printNodeCW(headNode);

        insertNode(headNode, '&', 54);
        printNodeCW(headNode);
        printf("\n%d\n", getLinkLength(headNode));

        deleteNode(headNode,55);
        printNodeCW(headNode);

        printf("\n%d\n", getLinkLength(headNode));

        destroyLink(headNode);

        return 0;
    }


    不同链表的比较

    多种链表的比较

    链式存储的优点

线性表的应用

  1. 有序表的合并

    • 线性表

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


      #define status int
      #define OK 1
      #define ERROR (-1)
      #define true 1
      #define false 0
      #define ElemType int


      typedef struct node {
          ElemType *elem;
          int length;
      } node, *linkList;

      status printfList(linkList headNode) {
          if (headNode == NULL) {
              return ERROR;
          }
          for (int i = 0; i < headNode->length; ++i) {
              printf(" %d ", headNode->elem[i]);
          }
          return OK;
      }

      status initList(linkList *headNode) {

          int num;
          printf("num:");
          scanf("%d", &num);
          (*headNode) = (node *) malloc(sizeof(node));
          (*headNode)->length = num;
          (*headNode)->elem = (ElemType *) malloc(sizeof(ElemType) * num);
          for (int i = 0; i < num; ++i) {
              scanf("%d", &(*headNode)->elem[i]);
          }
          return OK;
      }

      status combineList(linkList *headNode1, linkList headNode2) {
          int subLa = 0, subLb = 0;
          int l1 = (*headNode1)->length, l2 = headNode2->length;
          int i = 0;
          ElemType *temC = (int *) malloc(sizeof(int) * (l1 + l2));
          for (i = 0; subLa < l1 && subLb < l2; ++i) {
              temC[i] = (*headNode1)->elem[subLa] < headNode2->elem[subLb] ? (*headNode1)->elem[subLa++]
                                                                           : headNode2->elem[subLb++];
          }
          while (i < l1 + l2) {
              *(temC + i) = subLb < l2 ? (headNode2)->elem[subLb++] : (*headNode1)->elem[subLa++];
              i++;
          }
          (*headNode1)->elem = temC;
          (*headNode1)->length = l1 + l2;

          return OK;
      }


      status destroyLink(linkList pDel) {
          if (pDel == NULL) {
              return ERROR;
          }
          free(pDel->elem);
          free(pDel);
          return OK;
      }

      int main() {
          linkList headNode1 = NULL;
          linkList headNode2 = NULL;
          initList(&headNode1);
          initList(&headNode2);
          combineList(&headNode1, headNode2);
          printfList(headNode1);
          destroyLink(headNode1);
          destroyLink(headNode2);
          return 0;
      }

    • 链表

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


      #define status int
      #define OK 1
      #define ERROR (-1)
      #define true 1
      #define false 0
      #define ElemType int


      typedef struct node {
          ElemType elem;
          struct node *next;
      } node, *linkList;

      status initList(linkList *headNode) {

          (*headNode) = (node *) malloc(sizeof(node));
          (*headNode)->elem = 0;
          (*headNode)->next = NULL;
          int num;
          printf("num:");
          scanf("%d", &num);
          node *moveNode = (*headNode);
          for (int i = 0; i < num; ++i) {
              node *temNode = (node *) malloc(sizeof(node));
              temNode->next = NULL;
              scanf("%d", &temNode->elem);
              moveNode->next = temNode;
              moveNode = moveNode->next;
          }
      }

      status destroyList(linkList headNode) {
          if (headNode == NULL) {
              return ERROR;
          }
          node *moveNode = headNode;
          node *deleteNode = NULL;
          int num=0;
          while (moveNode != NULL) {
              deleteNode = moveNode;
              moveNode = moveNode->next;
              free(deleteNode);
              num++;
          }
          printf("%d",num);
          return OK;
      }

      status combineList(linkList *headNode, linkList headNode2) {
          if (headNode == NULL || headNode2 == NULL) {
              return ERROR;
          }
          node *moveNode1 = (*headNode)->next, *moveNode2 = headNode2->next, *moveNodeC = (*headNode);
          while (moveNode1 != NULL && moveNode2 != NULL) {
              if (moveNode1->elem > moveNode2->elem) {
                  moveNodeC->next = moveNode2;
                  moveNode2 = moveNode2->next;
                  moveNodeC=moveNodeC->next;
              } else {
                  moveNodeC->next = moveNode1;
                  moveNode1 = moveNode1->next;
                  moveNodeC=moveNodeC->next;
              }
          }
          moveNodeC->next = moveNode1==NULL ? moveNode2 : moveNode1;
          free(headNode2);
          return OK;
      }
      status printfNode(linkList headNode) {
          if (headNode == NULL) {
              return ERROR;
          }
          node *moveNode = headNode->next;
          while (moveNode != NULL) {
              printf(" %d ", moveNode->elem);
              moveNode = moveNode->next;
          }
          printf("\n");
          return OK;
      }
      int main() {
          linkList headNode1=NULL;
          linkList headNode2=NULL;
          initList(&headNode1);
          initList(&headNode2);
          printfNode(headNode1);
          combineList(&headNode1,headNode2);
          printfNode(headNode1);
          destroyList(headNode1);
          return 0;
      }
#数据结构和算法
线性表
https://tsy244.github.io/2023/03/27/数据结构/线性表/
Author
August Rosenberg
Posted on
March 27, 2023
Licensed under