Q$-5$: Upgrade your Caesar algorithm to Vigenere to encrypt and decrypt. Also upgrade it to allow changing the

hard coding of the ASCII alphabet $($if not already done$).$ E$.$g$.$ set a variable $($however your language does this$)$ to

define an alphabet. As an example, for $C++$ std::vector or std::string is recommended, such as:

std::string alphabet $=$ "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ$0123456789"$;

where $a=0,b=1,c=2$ etc...

$---$ being changed and rebuilt to use this alphabet $---$

std::string alphabet $="0123456789$abcdefghijklmnopqrstuvwxyz";

where ${?}^{\text{'}}0\text{'}=0,{?}^{\text{'}}{1}^{\text{'}}=1,{?}^{\text{'}}a\text{'}=10$ etc...

Upgrade your vigenere code to read from an input file and an output file. These can be supplied as arguments or

hard$-$coded $($but arguments will work better for future assignments$),$ e$.$g$.$

vigenere $|d=$KEY$=zA(020)012$;qua$\frac{d}{\frac{?}{?}}\frac{\frac{?}{?}}{?}(020)$

For any code if required please use Java!!