Write a function that accepts a password string “WasillaDogSleddingRulz” and per

Question

Write a function that accepts a password string “WasillaDogSleddingRulz” and perform a (very) weak encryption: For each character in the string, change the character to some other garbage character in the ASCII table by performing two consecutive, reversible math operations on it. Be sure the values do not go below 0 or above 127.
Write a second function that accepts your 'encrypted' string and reverses the encryption. This function will output another character array such that all the characters are the same as the original string. Include in your main method iterators that output the characters at each index of the three strings for comparison.

Explanation / Answer

//Header file section

#include<iostream>

#include<string>

using namespace std;

//main function

int main()

{

//variable declartion

string message;

string::iterator myIterator;

//Prompt the user for data and read the data from the user

cout << " Enter your choice of a string : ";

getline(cin, message);

myIterator = message.begin();

while ( myIterator != message.end() )

{

if ( *myIterator > 64 && *myIterator < 91 )

*myIterator = ( ( *myIterator - 65 + 13 ) % 26 ) + 65 ;

if ( *myIterator > 96 && *myIterator < 123 )

*myIterator = ( ( *myIterator - 97 + 13 ) % 26 ) + 97 ;

myIterator++;

}

//print the encrypted message

cout << " The encrypted message is " << message;

//move the iterator to the beginning of the message

myIterator = message.begin();

while ( myIterator != message.end() )

{

if ( *myIterator > 64 && *myIterator < 91 )

*myIterator = ( ( *myIterator - 65 + 13 ) % 26 ) + 65 ;

if ( *myIterator > 96 && *myIterator < 123 )

*myIterator = ( ( *myIterator - 97 + 13 ) % 26 ) + 97 ;

myIterator++;

}

//print the decrypted message

cout << " The decrypted message is " << message;

system("pause");

return 0;

}

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