结果 

 

整体代码

 主要实现

/*
 *实现
 * */
#include "./linklist.h"

linklist* create_linklist(datatype param){
    linklist* node=(linklist*)malloc(sizeof(linklist));

    if(NULL==node){
        puts("节点创建失败");
    }
    node->param=param;
    node->pnext=NULL;

    puts("结点创建成功");

    return node;
}
//头插
void insert_head_linklist(linklist* head,datatype param){
    linklist* newNode=(linklist*)create_linklist(param);

    newNode->pnext=head->pnext;
    head->pnext=newNode;
    head->param++;
}
//尾插
void insert_last_linklist(linklist* head,datatype param){
    linklist* newNode=(linklist*)create_linklist(param);

    linklist* p=head;

    while(NULL!=p->pnext){
        p=p->pnext;
    }

    p->pnext=newNode;
    newNode->pnext=NULL;
    head->param++;
}

//遍历
void foreach_linklist(linklist* head){ 

    linklist* p=head;
    puts("-------遍历-------");
    printf("链表总长度：");
    while(NULL!=p->pnext){
        printf("%d \n",p->param);
        p=p->pnext;
    }
    printf("%d \n",p->param);
    puts("-----------------");

}

//卸载堆空间
void free_null(linklist** node){
    printf("正在卸载%d的堆空间\n",(*node)->param);
    free(*node);
    *node=NULL;
    puts("已卸载堆空间");
}
//尾删
void delete_last_linklist(linklist* head){

    if(head == NULL || head->pnext == NULL){
        puts("链表为空或只有头结点");
        return;
    }

    linklist* p=head;

    while(NULL!=p->pnext->pnext){
        p=p->pnext;
    }

    free_null(&(p->pnext));
    head->param--;
    puts("尾删成功");
}
//头删
void delete_head_linklist(linklist* head){
    if(head == NULL || head->pnext == NULL){
        puts("链表为空或只有头结点");
        return;
    }
    linklist* temp=head->pnext;
    head->pnext=head->pnext->pnext;

    free_null(&temp);
    head->param--;
    puts("头删成功");
}

void insert_index_linklist(linklist *head, int index, datatype num)
{
    if(index > head->param+1 || index <= 0)
    {
        return;
    }

    linklist *p = head;
    for(int i=0; i<index-1; i++)
    {
        p = p->pnext;
    }

    linklist *temp = (linklist*)malloc(sizeof(linklist));
    temp->param = num;
    temp->pnext = p->pnext;
    p->pnext = temp;
    
    head->param++;
    puts("按位插入成功");
}
//指定位置删除节点
void delete_index_linklist(linklist *head, int index)
{
    if(NULL == head->pnext || NULL == head || index > head->param+1 || index <= 0)
    {                                                    
        return;
    }
    linklist *p = head;
    for(int i=0; i<index-1; i++)
    {
        p = p->pnext;
    }
    linklist *temp = (linklist*)malloc(sizeof(linklist));
    temp = p->pnext;
    p->pnext = temp->pnext;

    free_null(&temp);

    head->param--;

    puts("按位删除成功");
}