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

int compareStrings(const void *s1, const void *s2) {
    size_t i;

    for (i = 0; ((char*)s1)[i] == ((char*)s2)[i]; i++) {
        if (((char*)s1)[i] == '\0')
            return 0;
    }
    if ((unsigned char)((char*)s1)[i] < (unsigned char)((char*)s2)[i])
        return -1;
    else
        return 1;
}

char** stringSort(char** strings, size_t len) {
    qsort(*strings, len, sizeof(char*), compareStrings);
    return strings;
}

int main()
{
    char *arr[] = {"C", "CCC", "ABC", "test", "a", "c++"};
    int n = sizeof(arr) / sizeof(arr[0]);

    stringSort(arr, n);

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