pset 2 vigenere checking argument

gistfile1.c

// Allows only 1 keyword
    if (argc != 2)
    {
        return 1;
    }
    
    ciphertext = argv[1];
    cipherlength = strlen(ciphertext);
    
    // Rejects ciphers with non-alpha content
    for (int i = 0; i < cipherlength; i++)
    {
        if (!isalpha(ciphertext[i]))
        {
            return 1;
        }
    }