写了个实现ls功能的程序，听说设置参数可显示隐藏文件不过不知道怎么写，请高手帮个忙
#include<stdio.h>
#include<unistd.h>
#include<sys/types.h>
#include<dirnet>
#include<sys/stat.h>
#include<fcntl.h>
#include<stdlib.h>
#include<errno.h>
#define ERR_EXIT(n) (perror(n),exit(EXIT_FAILURE))
int main(void)
{  DIR *dir=opendir(".");
    struct dir *de;
    while((de=readdir(dir))!=NULL)
     {   if(strncmp(de->d_name,"."1)==0)
      contonue;
      printf("%s\n",de->d_name);
       }
closedir(dir);
exit(EXIT_SUCCESS);
return 0;


    }




}