Added version information for all classes

Headers/Playfair.hpp

@@ -1,7 +1,7 @@
 //Ciphers/Headers/Playfair.hpp
 //Matthew Ellison
 // Created: 4-25-18
-//Modified: 5-5-18
+//Modified: 5-16-18
 //This file contains the declaration of the Playfair class
 //It is designed to encrypt and decrypt strings using the Playfair cipher
 
@@ -20,6 +20,7 @@ private:
 	std::string inputString;	//The message that needs to be encoded/decoded
 	std::string outputString;	//The encoded/decoded message
 	std::string keyword;		//The keyword used to create the grid
+	static const std::string version;	//The current library's version number
 	char grid[5][5];			//The grid used to encode/decode the message
 	void createGrid();			//Create the grid from the keyword
 	bool checkGrid(const char letter) const;			//Returns true if the letter is found in the grid
@@ -45,6 +46,7 @@ public:
 	static void setReplaced(const char replaced);	//Sets the character that needs replaced in messages and the grid
 	static void setReplacer(const char replacer);	//Sets the character that replaces the character that needs replaced
 	static void setDoubled(const char doubled);		//Sets the character that is added betwee 2 adjacent characters that are the same
+	static std::string getVersion();
 };
 
 #endif //PLAYFAIR_HPP