//
//  minElement.c
//  minElement
//
//  Created by Saibhan on 4/16/15.
//  Copyright (c) 2015 Saibhan. All rights reserved.
//

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

void *minElement(void *beg, void *end, size_t size, int (*cmp)(void *s, void *q))
{
    void *res = beg;
    char *cur = beg;
    if (cur != end)
    {
        cur += size;

        while (cur != end)
        {
            if (cmp(res, cur) > 0)
            {
                res = cur;
            }
            cur += size;
        }
    }
    return res;
}

int cmpChar(void* p, void* q)
{
    return *((char *)p) - *((char *)q); // *((char *)p) casting to type pointer to character then we dereference it to 1 byte
}

int cmpInt(void* p, void* q)
{
    return *((int *)p) - *((int *)q); // *((char *)p) casting to type pointer to character then we dereference it to 1 byte
}

int cmpStr(void* p, void* q)
{
    return strcmp(*(char**)p, *(char**)q);
}

int main(void)
{
    char a1[] = {'a', '0', '1'};
    int a2[] = {1, 11, 5};
    char* a3[] = {"Java", "C", "C++"};

    char* pCharMin = (char *)minElement(a1, a1 + 3, sizeof(char), cmpChar);
    int* pIntMin = (int *)minElement(a2, a2 + 3, sizeof(int), cmpInt);
    char** pStrMin = (char **)minElement(a3, a3 + 3, sizeof(char*), cmpStr);

    printf("%c\n", *pCharMin);
    printf("%d\n", *pIntMin);
    printf("%s\n", *pStrMin);

    return 0;
}