Cs50 2018 Crack Solution

#define _XOPEN_SOURCE /*note, this software is 99% completed or should work, but it doesn't, cause when I unput my key and the salt into an if statement to test the key, it outputs me a different hash. */
#include <stdio.h>
#include <cs50.h>
#include <string.h>
#include <ctype.h>
#include <crypt.h>
#include <unistd.h>

void crackPassword(string hash);

int main(int argc, string argv[])
{
    if(argc == 2)
    {
        crackPassword(argv[1]);
    }
    else
    {
    printf("Error. \n");
    }
}

void crackPassword(string hash)
{
    char key[6] = "\0\0\0\0\0\0"; //5 Characters starting from A.. // Out Data;
    char salt[2] = "";
    salt[0] = hash[0];
    salt[1] = hash[1];
    int a[5]; a[0] = 0; a[1] = 0; a[2] = 0; a[3] = 0; a[4] = 0; //defines ints assigned to numbers (1-25 : A-Z |||||| 26 - 50 : a - z)
    bool boolLoop = true;
    do
    {
        a[0]++; //loops through every letter possible
        for(int y = 0; y < 4; y++ ) //calculates the change of the letters;
        {
            if (a[y] > 52)
            {
                a[y + 1]++;
                a[0] = 1;
            }
        }
        for(int i = 0; i < 5; i++)
        {
            int typeIn;
            if (a[i] < 26 && a[i] > 0)
            {
                typeIn = 64 + a[i];
                key[i] = (char)typeIn;
            }
            else if(a[i] > 25)
            {
                typeIn = 96 + a[i] - 25;
                key[i] = (char)typeIn;
            }
        }
        if(strcmp(crypt(key, salt), hash) == 0)
        {
            boolLoop = false;
        }
        if (a[4] > 50){
        printf("hash is fake");
        boolLoop = false;
        }
    }
    while(boolLoop == true); //a[4] > 50 -statement means, that the program has checked all the possible passwords.
    printf("%s \n",key);
}