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

#define T 1
#define F -1

typedef int Type;

struct Node
{
    Type value;
    struct Node *next;
};

int init(struct Node **head);            //初始化
int insert_head(struct Node *head, Type value);             // 头插法
int insert_tail(struct Node *head, Type value);                // 尾插法
int insert(struct Node *head, Type index, Type x);          // 在中间插入
int delete(struct Node *head, Type index);                      // 按位删除
int delete_value(struct Node *head, Type x);                  // 按值删除
int change_index(struct Node *head, Type index, Type x);                                    //按位改变
int change_value(struct Node *head, Type old_value, Type new_value);              //按值改变
void search_index(struct Node *head, Type index);       // 按位查值
void search_value(struct Node *head, Type value);       //按值查位
int length(struct Node *head);               // 输出长度
int print(struct Node *head);                  // 输出函数

int main()
{   
    int i;
    int ret;
    struct Node *head;
    ret = init(&head);
    
    for (i = 0; i <= 5; i++)
    {
        insert_head(head, i);    
    }
    print(head);

for (i = 0; i <= 5; i++)
    {
        insert_tail(head, i);    
    }
    print(head);

printf("%d\n", length(head));

    delete(head,2);
    delete(head,length(head) - 1);
    delete(head,0);
    print(head);

insert(head, 3,99);
    insert(head, 0,99);
    insert(head, length(head),99);
    print(head);
 
    delete_value(head, 0);
    print(head);

change_index(head, 4, 101);
    print(head);  

change_value(head, 99, 100);
    print(head);
 
    search_index(head, 7);
    
    search_value(head, 100);

return 0;
}

int init(struct Node **head)
{
    struct Node *newnode = (struct Node *)malloc(sizeof(struct Node));
    if (NULL == newnode)
    {
        return F;
    }
    newnode->value = 0;
    newnode->next = NULL;
    (*head) = newnode;
    return T;
}

int insert_head(struct Node *head, Type value)
{
    struct Node *newnode = (struct Node *)malloc(sizeof(struct Node));
    if (NULL == newnode)
    {
        return F;
    }
    
    newnode->value = value;
    newnode->next = head->next;
    head->next = newnode;
  
    return T;
}

int insert(struct Node *head, Type index, Type x)
{
    if (index < 0 || index > length(head))
    {
        printf("out of range\n");
        return F;
    }
    int i;
    for (i = 0; i < index; i++)
    {
        head = head->next;
    }
    
    struct Node *newnode = (struct Node *)malloc(sizeof(struct Node));
    if (NULL == newnode)
    {
        return F;
    }
    
    newnode->value = x;
    newnode->next = head->next;
    head->next = newnode;
  
    return T;
}  

int insert_tail(struct Node *head, Type value)
{
    struct Node *newnode = (struct Node *)malloc(sizeof(struct Node));
    if (NULL == newnode)
    {
        return F;
    }
    
    newnode->value = value;
    newnode->next = NULL;
    
    while (NULL != head->next)
    {
        head = head->next;
    }
    
    head->next = newnode;

return T;
}

int delete(struct Node *head, Type index)
{
    int i;
    struct Node *temp;
    if (index < 0 || index >= length(head))
    {
        printf("out of range\n");
        return F;
    }
    for (i = 0; i < index; i++)
    {
        head = head->next;
    }
    temp = head->next->next;
    free(head->next);
    head->next = temp;
    
    return T;
}

int delete_value(struct Node *head, Type x)
{
    int i;
    struct Node *temp;
    while (NULL != head->next)
    {
        if(head->next->value == x)
        {
            temp = head->next->next;
            free(head->next);
            head->next = temp;
        }
        else
        {
            head = head->next;
        }
    }
}

int change_index(struct Node *head, Type index, Type x)
{
    int i;
    if (index < 0 || index >= length(head))
    { 
        printf("out of range\n");
        return F;
    }
    for (i = 0; i <= index; i++)
    {
        head = head->next;
    }
    head->value = x;
    
    return T;
}

int change_value(struct Node *head, Type old_value, Type new_value)
{
    int count = 0;
    while (head->next != NULL)
    {
        if(head->next->value == old_value)
        {
            count = 1;
            head->next->value = new_value;
        }
        head = head->next;
    }
    if (count == 0)
    {
        printf("not find\n");
    }
    
    return T;
}
            
void search_index(struct Node *head, Type index)
{
    int i;
    if (index < 0 || index >= length(head))
    {
        printf("out of range\n");
    }
    for (i = 0; i <= index; i++)
    {
        head = head->next;
    }
    printf("%d\n",head->value);
    
}
    
void search_value(struct Node *head, Type value)
{
    int count = 0;
    while (head->next != NULL)
    { 
        if (head->next->value == value)
        {
            printf("%d  ",count);
        }
        head = head->next;
        count++;
    }
    printf("\n");
}
 
int length(struct Node *head)
{
    int count = 0;
    while (NULL != head->next)
    {
        count++;
        head = head->next;
    }
    
    return count;
}
   

int print(struct Node *head)
{
    while (head->next != NULL)
    {
        printf("%d  ", head->next->value);
        head = head->next;
    }
    printf("\n");
}

程序运行结果如下：