File list in C

Here's my program for files listing:

    #include <stdio.h>
    #include <string.h>
    #include <dirent.h>
    #include <unistd.h>
    #include <sys/stat.h>


    int list_files(char *parentdir);

    int main()
    {
        char s[80];

        system("chcp 1251");
        list_files("C:\\Documents and Settings\\user\\Desktop\\New Folder");
        system("pause");
        return 0;
    }

    int list_files(char *parentdir)
    {
      int file_count = 0;
      DIR *dir;
      struct dirent *de = NULL;
      char subdirs[1000][1000];
      int isubdirs = 0;

      char rootdir[1000];
      strcpy(rootdir, parentdir);

      FILE *fp = stdout;

    seek:
      dir = opendir(rootdir);
      if (!dir) {
        printf("\nERROR: [ %s ]\n", rootdir);
        perror("Couldn't opendir: ");
      }
      else {
        de = readdir(dir);
        if (!de) {
          printf("\nERROR:[ %s ]\n", rootdir);
          perror("Couldn't readdir ");
          goto out;
        }
        if (strcmp(de->d_name, "..") != 0 && strcmp(de->d_name, ".") != 0) {
          fprintf(fp, "%s\\%s\n", rootdir, de->d_name);
          file_count++;
        }
        while ((de = readdir(dir)) != NULL)
        {
          if (!strcmp(de->d_name, "..") || !strcmp(de->d_name, "."))
            continue;
          fprintf(fp, "%s\\%s\n", rootdir, de->d_name);
          int c = 0;
          char *t = de->d_name;
          file_count++;
          char filepath[1000];
          strcpy(filepath, rootdir);
          strcat(filepath, "\\");
          strcat(filepath, de->d_name);
          struct stat s;
          if (stat(filepath, &s) != 0) {
            printf("%s: ", filepath);
            perror("ERROR: stat:");
          }
          if (S_ISDIR(s.st_mode))
          {
            strcpy(subdirs[isubdirs], rootdir);
            strcat(subdirs[isubdirs], "\\");
            strcat(subdirs[isubdirs], de->d_name);
            isubdirs++;
          }
        }
        closedir(dir);
        if (isubdirs > 0) {
          strcpy(rootdir, subdirs[--isubdirs]);
          goto seek;
        }
      }
    out:

      fclose(fp);

      return file_count;
    }