Doing week 2 of CS50.Its supposed to be a ciphering algorithm. Ive gotten to the point where it ciphers my code BUT for some reason when I try testing my code and using my name, it doesnt make my second A char a lower cased a.

Key: NQXPOMAFTRHLZGECYJIUWSKDVB
Typing in: Armando

What I get–> ciphertext: NjzNgpe
What I want–> ciphertext: Njzngpe

#include <cs50.h>
#include <stdio.h>
#include <string.h>
#include <math.h>
#include <ctype.h>

char alpha[] = {'A','B','C','D','E','F','G','H','I','J','K','L','M',
                'N','O','P','Q','R','S','T','U','V','W','X','Y','Z'};
int cypher[] = {};
char new[] = {};

void cypher_s(string k);
void scramble(string s, int l);

int main(int argc, string argv[])
{
    if (argc == 2)
    {
        string key = argv[1];
        cypher_s(key);
        string text = get_string("plaintext: ");
        scramble(text, strlen(key));
    }
    else
    {
        printf("You suck, you need a command line argument or typed too manyn");
        return 1;
    }
}

void cypher_s(string k)
{
    for (int i = 0; i < strlen(k); i++)
    {
        cypher[i] = k[i];
    }
}

void scramble(string s, int l)
{
    for (int i = 0; i < strlen(s); i++)
    {
        int position = 0;
        for (int k = 0; k < l; k++)
        {
            if (s[i] == alpha[position])
            {
                printf("Capital %cn", s[i]);
                new[i] = cypher[position];
                position++;
            }
            else if (s[i] == tolower(alpha[position]))
            {
                printf("Lower %cn", s[i]);
                new[i] = tolower(cypher[position]);
                position++;
            }
            else
            {
                position++;
            }
        }
    }
    printf("ciphertext: ");
    for (int j = 0; j < strlen(new); j++)
    {
        printf("%c", new[j]);
    }
    printf("n");
}