Added classes for Encryption and Decryption

Decryption.cpp

@@ -0,0 +1,75 @@
+#include <iostream>
+#include <ios>
+#include <string>
+
+#include "Decryption.h"
+#include "GenerateKeys.h"
+
+Decryption::Decryption()
+{
+		
+}
+
+
+void Decryption::setMessage(const std::string message)
+{
+	this->message = message;
+}
+void Decryption::decryptMessage()
+{
+	GenerateKeys gk;	
+
+	readFromFile.open("encryptedFile.txt", std::ios::in);
+
+	std::string messageToBeDecrypted, decryptedMessage;
+
+	while(!readFromFile.eof())
+	{
+		char whiteSpace = static_cast<char>(32);
+		//std::cout << "Am I stuck?" << std::endl;
+		getline(readFromFile, messageToBeDecrypted, whiteSpace);
+	}
+
+	readFromFile.close();
+
+	unsigned short encryptedTwoKey = 2;
+	unsigned short beginningOfAlphabetLowerCase = 97;
+	unsigned short endingOfAplphabetLowerCase = 122;
+	unsigned short whiteSpaceASCIICode = 32;
+	for (unsigned short index = 0; index < messageToBeDecrypted.size(); index++)
+	{
+		if ((index + encryptedTwoKey) < messageToBeDecrypted.size())
+		{
+			char otherElements[] = {messageToBeDecrypted.at(index), messageToBeDecrypted.at(index + 1), messageToBeDecrypted.at(index + 2)};
+			unsigned short number = atoi(otherElements);
+
+			if ((number > endingOfAplphabetLowerCase || number < beginningOfAlphabetLowerCase) && (number != whiteSpaceASCIICode))
+			{
+				otherElements[0] = {messageToBeDecrypted.at(index)};
+				otherElements[1] = {messageToBeDecrypted.at(index + 1)};
+				otherElements[2] = {' '};
+				number = atoi(otherElements);
+				decryptedMessage += gk.decryptedCharacters[number];
+				//decryptedMessage.append(gk.decryptedCharacters[number]);
+				//newWord += characters[number];
+				index += 1;
+					
+			}
+			else
+			{
+				decryptedMessage += gk.decryptedCharacters[number];
+				//decryptedMessage.append(gk.decryptedCharacters[number]);
+				//newWord += characters[number];
+				index += 2;
+			
+			}
+		}
+	}
+	setMessage(decryptedMessage);
+}
+
+
+std::string Decryption::getMessage() const
+{
+	return message;
+}