C语言的链表的相关操作

本变博客源于自己想复习一下C语言，所以便自己动手复习了一下链表的相关操作。做个人记录使用。
main.c

#include <stdio.h>
#include "list.h"int main()
{student *a;printf("hello world\n") ;printf("----初始化列表----------\n");a=init();printf("----创建列表----------\n");create_front_list(a,3);printf("list的个数为：count= %d\n",count);printf("----读取列表3位置上数据----------\n");read_any_list(a,3);printf("------------读取全部数据------------------\n");read_all_list(a);printf("----------插入列表，插入到位4的后面--------------------\n");insert_behind_list(a ,4);printf("----------插完后的列表数据---------\n");read_all_list(a);printf("------------删除列表指定位置的数据-------------------\n");delete_list(a,2);printf("-------------删除后列表的数据------------------\n");read_all_list(a);return 0;
}

list.c

#include<stdio.h>
#include <stdlib.h>
#include "list.h"
int count = 0;
student *init()
{//chuangjian节点student * head=(struct student *)malloc(sizeof(student));if(head==NULL){printf("n=malloc failed \n");return NULL;}head->num=0;head->score=99.2;head->next=NULL;count++;return head;}//链表的建立
void create_front_list(student *head,int n)
{   int i;student * last;student * s;last=head;s=head;printf("请你输入%d个整数\n",n);for(i=0;i<n;i++){printf("begin to input\n");s->next=(struct student *)malloc(sizeof(student));last=s->next;s=last;scanf("%d,%f",&(s->num),&(s->score));printf("end to input\n");count++;}s->next=NULL;last=NULL;s=NULL;return ;
}//链表的读取操作
void read_all_list(student * head)
{int i;printf("total data in list is \n");student *re=head;if(head==NULL){printf("NO data\n");return ;}else{for(i=0;i<count;i++){printf("num = %d  score= %f \n",re->num, re->score);re=re->next;}}}//读取其中指定第几个节点的数值
void read_any_list(student * head,int n)
{  int i=1;student *re=head;printf("That you want to read list sequence is  %d\n",n);if(n>count){printf("The number you have input exceeds the max length of this list \n ");return ;}else{while(true){re=re->next;i++;if(i==n){printf("the number has been find ,data as follow \n");printf("num= %d, score= %f\n",re->num,re->score);break;}}return ;}}//链表的插入//由于是单链表所以我这里只使用尾部
void insert_behind_list(student * head ,int n)
{printf("insert behind list \n\n");int i;student * s=head;if(n>count){//表名插入的位置已经查过了节点长度printf("you has exceed this max length\n");return ;}else{    //开辟一个新的节点student * last=(struct student *)malloc(sizeof(student));printf("please input your inserted data \n");scanf("%d,%f",&(last->num),&(last->score));for(i=1;i<n;i++){s=s->next;//借助一个指针指向你想插入的节点前面}last->next=s->next;s->next=last;last=NULL;printf("---------end of insert data--------\n");count++;}}//链表的删除
void delete_list(student * head,int n)
{int i;student * s=head;student * q=head->next;printf("the number do you want to delete is number %d",n);if(n>count){printf("there are no data \n");}else{for(i=1;i<n;i++){s=s->next;q=q->next;}printf("你想删除的数据是：%d,%f",q->num,q->score);s->next=q->next;free(q);count--;//记录节点的个数的}}

list.h

#define true 1
#define flase 0typedef struct student{int num;float score;struct student *next ;}student;
extern int count;
student *init();
void create_front_list(student *head,int n);
void read_all_list(student * head);
void read_any_list(student * head,int n);
void insert_behind_list(student * head ,int n);
void delete_list(student * head,int n);

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备注：每次更改操作后必须使用count–,否则内存就会出现泄漏。
 
hello world
----初始化列表----------
----创建列表----------
请你输入3个整数
begin to input
1,1
end to input
begin to input
2,2
end to input
begin to input
3,3
end to input
list的个数为：count= 4
----读取列表3位置上数据----------
That you want to read list sequence is 3
the number has been find ,data as follow
num= 2, score= 2.000000
------------读取全部数据------------------
total data in list is
num = 0 score= 99.199997
num = 1 score= 1.000000
num = 2 score= 2.000000
num = 3 score= 3.000000
----------插入列表，插入到位4的后面--------------------
insert behind list

please input your inserted data
4,4
---------end of insert data--------
----------插完后的列表数据---------
total data in list is
num = 0 score= 99.199997
num = 1 score= 1.000000
num = 2 score= 2.000000
num = 3 score= 3.000000
num = 4 score= 4.000000
------------删除列表指定位置的数据-------------------
the number do you want to delete is number 2你想删除的数据是：2,2.000000-------------删除后列表的数据------------------
total data in list is
num = 0 score= 99.199997
num = 1 score= 1.000000
num = 3 score= 3.000000
num = 4 score= 4.000000

Process returned 0 (0x0) execution time : 27.276 s
Press any key to continue.

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