利用链表实现目录内所有文件列表显示

#include <stdio.h>
#include <dirent.h>
#include <alloc.h>
#include <string.h>

void main(int argc,char *argv[])
{
  DIR *directory_pointer;
  struct dirent *entry;
  struct FileList
  {
    char filename[64];
    struct FileList *next;
  }start,*node;
  if (argc!=2)
  {
    printf("Must specify a directory\n");
    exit(1);
  }
  if ((directory_pointer=opendir(argv[1]))==NULL)
    printf("Error opening %s\n",argv[1]);
  else
  {
    start.next=NULL;
    node=&start;
    while ((entry=readdir(directory_pointer))!=NULL)
    {
      node->next=(struct FileList *)malloc(sizeof(struct FileList));
      node=node->next;
      strcpy(node->filename,entry->d_name);
      node->next=NULL;
    }
    closedir(directory_pointer);
    node=start.next;
    while(node)
    {
      printf("%s\n",node->filename);
      node=node->next;
    }
  }
}