diff --git a/helperFunctions.hpp b/helperFunctions.hpp
index 8acd6ee..bdb5b0a 100644
--- a/helperFunctions.hpp
+++ b/helperFunctions.hpp
@@ -19,7 +19,7 @@
 #include <string>
 
 
-enum CipherFlagLocation { CAESAR, PLAYFAIR, VIGENERE, NUM_CIPHERS,
+enum CipherFlagLocation { CAESAR, PLAYFAIR, VIGENERE, ATBASH, NUM_CIPHERS,
 						ENCODE, DECODE, INPUT_FILE, OUTPUT_FILE, SIZE };
 std::string flagStrings[SIZE];
 //Error handling
@@ -29,6 +29,9 @@ std::string runCaesar(std::ifstream& infile, bool encode);
 std::string runPlayfair(std::ifstream& infile, bool encode);
 std::string runVigenere(std::ifstream& infile, bool encode);
 
+//For the getCipher function
+typedef std::string (*Fn)(std::ifstream&, bool);
+
 
 
 void getFlags(int argc, char** argv, bool cipherFlags[], std::string& inputFileString, std::string& outputFileString){
@@ -92,12 +95,34 @@ void setFlagStrings(){
 	flagStrings[CAESAR] = "-c";
 	flagStrings[PLAYFAIR] = "-p";
 	flagStrings[VIGENERE] = "-v";
+	flagStrings[ATBASH] = "-a";
 	flagStrings[ENCODE] = "-e";
 	flagStrings[DECODE] = "-d";
 	flagStrings[INPUT_FILE] = "-i";
 	flagStrings[OUTPUT_FILE] = "-o";
 }
 
+//Returns the correct function for the flags that are set
+Fn getCipher(const bool cipherFlags[]){
+	if(cipherFlags[CAESAR]){
+		return runCaesar;
+	}
+	else if(cipherFlags[PLAYFAIR]){
+		return runPlayfair;
+	}
+	else if(cipherFlags[VIGENERE]){
+		return runVigenere;
+	}
+	else if(cipherFlags[ATBASH]){
+		return runAtbash;
+	}
+	//If it didn't trip one of the flags, there was an error before this
+	else{
+		std::cout << "There was an error selecting the appropriate function";
+		exit(0);
+	}
+}
+
 std::string runCaesar(std::ifstream& infile, bool encode){
 	std::string inputString, cipherString;
 	int offset;
@@ -193,4 +218,32 @@ std::string runVigenere(std::ifstream& infile, bool encode){
 	return cipherString;
 }
 
+std::string runAtbash(std::ifstream& infile, bool encode){
+	std::string inputString, cipherString;
+	Atbash cipher;
+	//Check if the input file is open
+	if(infile.is_open()){
+		std::getline(infile, inputString);
+		if(infile.fail()){
+			failFlag = true;
+			cipherString = "Input file has an incorrect format\n";
+		}
+	}
+	//Otherwise prompt for the appropriate strings
+	else{
+		std::cout << "Enter the input string: ";
+		std::getline(std::cin, inputString);
+	}
+
+	//Run the correct cipher
+	if(encode){
+		cipherString = cipher.encode(inputString);
+	}
+	else{
+		cipherString = cipher.decode(inputString);
+	}
+
+	return cipherString;
+}
+
 #endif //HELPER_FUNCTIONS_HPP
\ No newline at end of file