created encryptionOperation function

see next commit for context

include/flags.h

@@ -64,4 +64,7 @@ void setEncryptionSeparator(char encryptionSeparatorNew);
 void setKeyLength(int keyLengthNew);
 void setFlags(inputFlags newFlags); //.... whatcha think?
 
+//RANDOM SHIT THAT DOESN'T FIT IN MISC, SO I PUT IN HERE
+int encryptionOperation(int text, int encryptedText);
+
 #endif

src/lib/flags.c

@@ -64,4 +64,11 @@ void setKeyLength(int keyLengthNew)
 void setFlags(inputFlags newFlags)
 {
     flags = newFlags;
+}
+
+//THAT COMMENT AFTER 'SETTERS'
+int encryptionOperation(int text, int encryptedText)
+{
+    //CHANGE THE '-' (MINUS) OPERATOR TO SOMETHING YOU WANT TO USE I GUESS
+    return text - encryptedText;
 }