int nfiles2(char * name) {

    DIR dirp;
    struct dirent dp;
    dirp = opendir(name);
    if(dirp==-1) {
        return -1;
    }
    int count=0;
    while ((dp = readdir(dirp)) != -1) {
        count++;
    }

    int err = closedir(dirp);
    if(err<0) {
        return -1;
    }
    return(count);
}

int nfiles(char * name) {

    DIR *dirp;
    struct dirent *dp;
    dirp = opendir(name);
    if(dirp==NULL) {
        return -1;
    }
    int count=0;
    while (readdir(dirp) != NULL) {
        count++;
    }
    int err = closedir(dirp);
    if(err<0) {
        return -1;
    }
    return(count);
}

int nfiles(char * name) {

    DIR dirp;
    struct dirent dp;
    dirp = opendir(name);
    int count=0;
    while ((dp = readdir(dirp)) != NULL) {
        if (dp->d_type==DT_REG) {
            count++;
        }
    }
    int err = closedir(dirp);
    if(err<0) {
        return -1;
    }
    return(count);
}

int nfiles(char * name) {
    DIR *dirp;
    struct dirent *dp;
    dp=malloc(sizeof(struct dirent));
    if(dp==NULL) {
        return -1;
    }
    dirp = opendir(name);
    if(dirp==NULL) {
        return -1;
    }
    int count=0;
    while ((dp = readdir(dirp)) != NULL) {
        if (dp->d_type==DT_REG) {
            count++;
        }
    }
    int err = closedir(dirp);
    if(err<0) {
        return -1;
    }
    return(count);
}