#include <stdio.h>
#include <stdlib.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <dirent.h>

int main(int argc, char *argv[])
{ int ret;
  DIR *dp;
  struct dirent *dir;
  if (argc != 2){
    printf("Uage:%s <name file>\n",argv[0]);
    return  -1;
  };
  dp = opendir(argv[1]);
  if (dp == NULL) {
    printf("opendir is error\n\n");
    return -2;
  }
  printf("opendir is ok\n");
  while(1)
  {
    dir = readdir(dp);
    if (dir!=NULL) {
      printf("file name is %s\n",dir->d_name);
    }
    else 
    break;
  }
  closedir(dp);
  return 0;
}