pb3 ppsp

#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <dirent.h>
#include <fcntl.h>           /* Definition of AT_* constants */
#include <sys/stat.h>


void traverseDir(const char dirpath[]) {
    DIR *dir = opendir(dirpath);
    if (dir == NULL) {
        perror("opendir");
        exit(-1);
    }
    for (struct dirent *dep; (dep = readdir(dir));) {

    }
    if (closedir(dir)) {
        perror("");
    }
}

int main(int argc, char *argv[]) {
    if (argc != 5) {
        fprintf(stderr, "Usage: %s <directory> <letter> <number> <output_file_path>\n", argv[0]);
        exit(-1);
    }

}