链表小结

.需要先清楚一点，指针指向的是地址！！！

1.创建链表，插入数据

      1.头插法(看图）

 

 代码实现

#include<stdio.h>
#include<stdlib.h>
struct student
{
    int data;
    struct student *next;
 };
 
 int main()
 {
     int a[10]={1,2,3,4,5,6,7,8,9,10};/*无头节点-头插法*/ 
     struct student *head=NULL,*p;
     for(int i=0;i<10;i++)
     {
         p=(struct student*)malloc(sizeof(struct student));
         p->next=NULL;
         p-> data=a[i];
         p->next=head;/*指针指向的是地址*/ 
         head=p;
      } 
      p=head;/*head不能带着一直跑会乱掉*/
      while(p!=NULL)
      {
          printf("%d ",p->data);
          p=p->next;
       } return 0;
 }

#include<stdio.h>
#include<stdlib.h>
struct stu
{
    int data;
    struct stu *next;
};
int main()
{
    int a[3]={1,2,3};
    struct stu *List,*p;/*带头节点*/ 
    List=(struct stu*)malloc(sizeof(struct stu));
    List->next=NULL; 
    for(int i=0;i<3;i++)
    {
        p=(struct stu*)malloc(sizeof(struct stu));
        p->data=a[i];
        p->next=List->next;
        List->next=p;
    }
    p=List->next;/*从第一个节点开始*/ 
    while(p)
    {
        printf("%d",p->data);
        p=p->next;
    }return 0;
    
}

2.尾插法

 

 代码实现

#include<stdio.h>
#include<stdlib.h>
struct stu
{
    int data;
    struct stu *next;
};
int main()
{
    int a[5]={1,2,3,4,5};
    struct stu *head=NULL,*tail=NULL,*p;
    for(int i=0;i<5;i++)
    {
        p=(struct stu*)malloc(sizeof(struct stu));
        p->data=a[i];p->next=NULL; 
        
        
        if(head)
        {tail->next=p;
        
            
        }else
        {
                head=p;}
        tail=p;
        
    }p=head;
    while(p)
    {
        printf("%d ",p->data);
        p=p->next; 
         
    }return 0;
}

#include<stdio.h>
#include<stdlib.h>
struct stu
{
    int data;
    struct stu *next;
};
int main()
{
    int a[3]={1,2,3};
    struct stu *List,*tail=NULL,*p;
    List=(struct stu*)malloc(sizeof(struct stu));
    List->next=NULL;
    tail=List;
    for(int i=0;i<3;i++)
    {
        p=(struct stu*)malloc(sizeof(struct stu));
        p->data=a[i];
        p->next=NULL;
        tail->next=p;
        tail=p;
        
     } p=List->next;
     while(p)
     {
         printf("%d ",p->data);
         p=p->next;
     }return 0;
    }
    
    
    

遍历链表

for(p=head;p!=NULL;p=p->next) 
    {
        printf("%d",p->data); 
    }

while(p)
     {
         printf("%d ",p->data);
         p=p->next;
     }

3.删除节点

 

 

 

 

        if(q->data==2)
        {
            p->next=q->next;
            free(q);
            q=p->next;
        }else
        {
            p=p->next;
            q=p->next;
        }

 

先这样啦，如果有错误，欢迎指出( •̀ ω •́ )✧