qsort.c

#include <iostream>
#include <windows.h>

int cmpfunc(const void * a, const void * b) {
    return ( *(int*)a - *(int*)b );
}

int cstring_cmp(const void * a, const void * b) {
    const char **ia = (const char **)a;
    const char **ib = (const char **)b;
    return strcmp(*ia, *ib);
}

int main() {
    int values[] = { 22, 23, 454, 1, 2, 3};
    qsort(values, 6, sizeof(int), cmpfunc);

    char *strings[] = { "Zorro", "Alex", "Celine", "Bill", "Forest", "Dexter" };
    qsort(strings, sizeof(strings) / sizeof(char *), sizeof(char *), cstring_cmp);

    return (0);
}