数据结构之单向链表（C语言实现）

Posted 2023-02-17 乌云中的闪电

1.创建结构体

struct Node

    int data;
    struct Node* next;
;

2.创建新的节点

struct Node* Creatlist()

    struct Node* HeadNode = (struct Node*)malloc(sizeof(struct Node));
    HeadNode->next = NULL;
    return HeadNode;

3.三种插入法

（1）头插法

void insert_By_Head(struct Node* Headnode, int data)

    struct Node* newNode = CreateNode(data);
    newNode->next = Headnode->next;
    Headnode->next = newNode;

（2）尾插法

void insert_By_Tail(struct Node* HeadNode, int data)

    struct Node* NewNode = CreateNode(data);
    struct Node* TailNode = HeadNode;
    while (TailNode->next != NULL)
        TailNode = TailNode->next;
    NewNode->next = TailNode->next;
    TailNode->next = NewNode;   

(3)指定插入法

void insert_By_appoint_pos(struct Node* HeadNode, int data, int posdata)

    struct Node* posFrontNode = HeadNode;
    struct Node* posNode = HeadNode->next;
    while (posNode != NULL && posNode->data != posdata)
    
        posFrontNode = posNode;
        posNode = posFrontNode->next;
    
    if (posNode == NULL)
        printf("未找到指定位置，无法插入！\\n");
    else
    
        struct Node* newNode = CreateNode(data);
        posFrontNode->next = newNode;
        newNode->next = posNode;
    

4.三种删除法

（1）头删法

void delete_By_Head(struct Node* HeadNode)

    struct Node* nextNode = HeadNode->next;
    if (nextNode == NULL)
    
        printf("链表为 NULL，无法删除！\\n");
        return;
    
    HeadNode->next = nextNode->next;
    free(nextNode);

（2）尾删法

void delete_By_Tail(struct Node* HeadNode)

    struct Node* TailFrontNode = HeadNode;
    struct Node* TailNode = HeadNode->next;
    if (TailNode == NULL)
    
        printf("链表为 NULL，无法删除！\\n");
        return;
    
    while (TailNode->next != NULL)
    
        TailFrontNode = TailNode;
        TailNode = TailFrontNode->next;
    
    TailFrontNode->next = NULL;
    free(TailNode);

（3）指定位置删除法

void delete_By_Appoint_pos(struct Node* HeadNode, int posdata)

    struct Node* posFrontNode = HeadNode;
    struct Node* posNode = HeadNode->next;
    while (posNode != NULL && posNode->data != posdata)
    
        posFrontNode = posNode;
        posNode = posFrontNode->next;
    
    if (posNode == NULL)
    
        printf("未找到指定节点，无法删除！\\n");
        return;
    
    else
    
        posFrontNode->next = posNode->next;
        free(posNode);
    

5.打印链表

void PrintList(struct Node* HeadNode)

    struct Node* pMove = HeadNode->next;
    while (pMove)
    
        printf("%d-->", pMove->data);
        pMove = pMove->next;
    
    printf("\\n");