C语言学习016:单链表

 1 #include <stdio.h>
 2 
 3 //定义一个链表，链表是一种递归结构，在定义的时候必须要给结构起一个名字
 4 typedef struct folder{
 5     int level;
 6     char* filename;
 7     struct folder* child;//通过指针链接下一个结构
 8 }folder;
 9 
10 int main(){
11     folder first={1,"first",NULL};
12     folder second={2,"second",NULL};
13     folder thread={3,"thread",NULL};
14     first.child=&second;
15     second.child=&thread;
16     folder* i=&first;
17     for(;i!=NULL;i=i->child){
18         printf("%s level is %i \n",i->filename,i->level);
19     }
20     return 0;
21 }

    second.child=&thread;
    folder fourth={4,"fourth",NULL};