fix-abb-volumen.c

#include <time.h>
#include <stdlib.h>
...


static void swap(void* array[], size_t p1, size_t p2)
{
    void* temp = array[p1];
    array[p1] = array[p2];
    array[p2] = temp;
}

static void prueba_abb_volumen(size_t largo, bool debug)
{
    const size_t largo_clave = 10;
    char* claves[largo];
    unsigned* valores[largo];

    for (unsigned i = 0; i < largo; i++)
    {
        claves[i] = malloc(largo_clave);
        valores[i] = malloc(sizeof(unsigned));
        sprintf(claves[i], "%08d", i);
        *valores[i] = i;
    }

    srand((unsigned int) time(NULL));

    // Mezclamos el array: algoritmo de Fisher–Yates
    for(int i = (int) (largo - 1); i >= 0; i--)
    {
        unsigned int j = rand() % (i+1);
        swap((void**) claves, i, j);
    }

    ...
    // ¡Recordar liberar las claves!
}