4th gen masuda method + everstone

#include <iostream>
#include <stdio.h>

using namespace std;

#define SHINY 1;

typedef unsigned long long u64;
typedef unsigned int u32;
typedef unsigned short u16;
typedef unsigned char u8;

u32 seed = 0;

u32 ARNG(u32 seed);
u32 getNature(u32 seed);
bool isShiny(u32 seed, u32 tid, u32 sid);

int main()
{
    u32 nature = 0;
    u32 temp_nature = 0;
    u32 counter = 0;
    u32 seed_counter = 0;
    u32 tid = 0;
    u32 sid = 0;


    scanf_s("%x", &seed);
    scanf_s("%u", &nature);
    scanf_s("%u", &tid);
    scanf_s("%u", &sid);


        while(counter < 4)
        {
            if(isShiny(seed, tid, sid))
            {
                printf("first seed was shiny.");
                break;
            }

            seed = ARNG(seed);
            seed_counter++;

            temp_nature = getNature(seed);

            if(nature == temp_nature)
            {
                counter++;
                if(isShiny(seed, tid, sid))
                {
                    printf("%u was shiny.", counter);
                    break;
                }

            }

        }

        printf("%u", seed_counter);

    while(1){}


    return 0;
}


u32 ARNG(u32 seed)
{
    seed = (seed * 0x6C078965) + 1;

    return seed;
}

u32 getNature(u32 seed)
{
    return (seed % 25);
}

bool isShiny(u32 seed, u32 tid, u32 sid)
{
    u16 hseed = seed >> 16;
    u16 lseed = seed & 0xFFFF;

    u16 xid = tid ^ sid;
    u16 xseed = hseed ^ lseed;

    u16 xshiny = xid ^ xseed;

    if(xshiny < 8)
    {
        return true;
    }
    else
    {
        return false;
    }

}