Updated 17 to throw exception

Headers/Problems/Problem17.hpp

@@ -41,6 +41,7 @@ private:
 
 	//Functions
 	std::string makeWordFromNum(int number);	//This function makes a word out of the number passed into it
+	std::string wordHelper(int num);	//This function helps makeWordFromNum() by returning the words for the numbers 1-9
 	uint64_t countLetters(std::string str);	//This counts the number of letters in the string that is passed in (ignoring numbers and punctuation)
 public:
 	//Constructor