tremendo codigaso ayudantia, C (gcc)

tremendo codigaso ayudantia

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <ctype.h>
#define MAX 26
#define TOTAL_BASES 4
#define BASES "acgt"

struct BaseNitrogenada{
  int repeticiones;
  char letra;
};

void procesarDatos(int);
struct BaseNitrogenada **crearBasesNitrogenadas();
struct BaseNitrogenada *crearBase(char);
void contarRepeticiones(char *, struct BaseNitrogenada **);
void mostrar(char *, struct BaseNitrogenada **);
void freeBases(struct BaseNitrogenada **);

int main() {
    int rep;
    scanf("%i", &rep);
    procesarDatos(rep);
    return 0;
}

void procesarDatos(int rep) {
    printf("         CADENA ADN        #A   #C   #G   #T\n");
    printf("=============================================\n");
    for(int i = 0 ; i < rep ; i++) {
        char *adn = (char *) malloc(MAX);
        scanf("%s", adn);
        struct BaseNitrogenada **bases = crearBasesNitrogenadas();
        contarRepeticiones(adn, bases);
        mostrar(adn, bases);
        free(adn);
        freeBases(bases);
    }
}

struct BaseNitrogenada **crearBasesNitrogenadas() {
    struct BaseNitrogenada **bases = (struct BaseNitrogenada **) malloc(sizeof(struct BaseNitrogenada *) * TOTAL_BASES);
    for(int i = 0 ; i < TOTAL_BASES ; i++) {
        bases[i] = crearBase(BASES[i]);
    }
    return bases;
}

struct BaseNitrogenada *crearBase(char letra) {
    struct BaseNitrogenada *base = (struct BaseNitrogenada *) malloc(sizeof(struct BaseNitrogenada));
    base->letra = letra;
    base->repeticiones = 0;
    
    return base;
}

void contarRepeticiones(char *adn, struct BaseNitrogenada **bases) {
    for(int i = 0 ; i < strlen(adn) ; i++) {
        for(int j = 0 ; j < TOTAL_BASES ; j++) {
            if(tolower(adn[i]) == bases[j]->letra) {
                bases[j]->repeticiones += 1;
                break;
            }
        }
    }
}

void mostrar(char *adn, struct BaseNitrogenada **bases) {
    printf("%25s", adn);
    for(int i = 0 ; i < TOTAL_BASES ; i++) {
        if(i == 0) {
            printf("%4i", bases[i]->repeticiones);
        } else {
            printf("%5i", bases[i]->repeticiones);
        }
    }
    printf("\n");
}

void freeBases(struct BaseNitrogenada **bases) {
    for(int i = 0 ; i < TOTAL_BASES ; i++) {
        free(bases[i]);
    }
    free(bases);
}


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