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

int compare(const void* a1, const void* a2)
{
    const char** s1   = a1;
    const char** s2   = a2;
    const int result = strcmp(*s1, *s2); 
    return result;
}

int main()
{
    char* s[] = { "e", "d", "c", "b", "a" };
    const size_t s_element_size  = sizeof(s[0]);
    const size_t s_element_count = sizeof(s) / s_element_size;
    size_t i;

    for (i = 0; i < s_element_count; i++)
    {
        printf("[%s]\n", s[i]);
    }
    printf("\n");

    qsort(s, s_element_count, s_element_size, compare);

    for (i = 0; i < s_element_count; i++)
    {
        printf("[%s]\n", s[i]);
    }

    return 0;
}