A simple ROT encryption can be used to obfuscate a string of characters by adding a number to each

character, called the key. Here is a $C++$ function definition for the function encryptRQT$().$ The

function uses pass by reference, and forces the encrypted string to remain in the ASCII printable

character range.

$//$ Preconditions: string s$,$ int key

$//$ Postconditions: encrypted s

void encryptROT $($string& s$,$ int key$)$

$\{$

for $($int $s[i]=(s[i]+$key;$i$

$\{$

$s[i]=(s[i]+$key$)$ & $128$ ;

$if(s[i]<mn\; id="EditorElement\_13744817">3</mn><mn\; id="EditorElement\_13744818">3</mn><mi\; id="EditorElement\_13744820">)</mi>$

$\{$

$s[i]=s[i]+33$;

$\}$

$\}$

the code i was provided earlier for this did not work. I code in VS$.$ please provide a working code.

code example $-$

$\mathrm{.}586$

$.$MODEL FLAT

INCLUDE io$.$h ; header file for input$/$output

$.$STACK $4096$

DA

valueA DWORD $?$

valueB DWORD $?$

valueC DWORD $?$

prompt$1$ BYTE "Value of a$?",0$

prompt$2$ BYTE "Value of b$?($not zero$)",0$

prompt$3$ BYTE "Value of c$?",0$

string BYTE $40$ DUP $(?)$

result BYTE $11$ DUP $(?),0$

resultLbl BYTE "Expression vaCODE

$\_$MainProc PROC