Sortare fisier, mai elegant

#include <stdio.h>
#include <string.h>
#include <stdlib.h>


int cmpfunc (const void * a, const void * b) {
    char* c1;
    char* c2;
    c1 = *(char**)a;
    c2 = *(char**)b;
    int rez=0;
    rez = strcmp(c1, c2);
    printf("%s %d %s\n", c1, rez, c2);
    return rez;
}

int main(){
    FILE *f;
    char* nume_fisier = "src/in.txt";
    char* str;
    f = fopen(nume_fisier, "r");
    if (f == NULL){
            printf("Could not open file %s",nume_fisier);
            return -1;
    }

    fseek(f, 0L, SEEK_END);
    int file_length = ftell(f);
    fseek(f, 0L, SEEK_SET);

    str = (char*)malloc((file_length +1) * sizeof(char));
    memset(str, 0, (file_length +1) * sizeof(char));

    int no_read_characters;
    no_read_characters = fread(str, sizeof(char), file_length, f);
    printf("am citit %d caractere\n%s\n", no_read_characters, str);

    char* cuvinte[100];
    int nr_cuvinte = 0;
    char * token;
    char* delimitatori = " \n?.!";
    /* get the first token */
    token = strtok(str, delimitatori);
    /* walk through other tokens */
    while( token != NULL ) {
        cuvinte[nr_cuvinte] = token;
        nr_cuvinte++;
        token = strtok(NULL, delimitatori);
    }

    printf("Nr cuvinte: %d\n", nr_cuvinte);

    qsort(cuvinte, nr_cuvinte, sizeof(char*), cmpfunc);

    printf("Cuvintele sunt: ");
    for(int i=0; i < nr_cuvinte; i++){
        printf("%s ", cuvinte[i]);
    }

    fclose(f);
    free(str);
    printf("\ndone");
}