How to remove same words from set?

[Sujing]

I want to find the number of unique words. I have a code that does that but not quite what I want. It is only processing one line at a time and not looking at all of the lines at the same time to find the unique words, thus giving me the incorrect number of unique words.

So, I was thinking whether or not if there was a way to remove the same word that has already been inserted into the set. I am not sure how to go about it or if there's another way.

unsigned long countUWords(const string& s)
{
   set<string> uw;
   string word = "";
   for(size_t i = 0; i < s.size(); i++){
       bool words = (s[i] >= 'a' && s[i] <= 'z') || (s[i] >= 'A' && s[i] <= 'Z');
           if(words){
               word += s[i];
           }
           else if(!words && word != ""){
               uw.insert(word);
               word = "";
           }
   }
   if (word != "")
       uw.insert(word);
   return uw.size();
}

[Josue Molina]

So, I was thinking whether or not if there was a way to remove the same word that has already been inserted into the set.

std::set only stores unique values.

[Sujing]

Okay that is true. Let me ask a different question then. How do I let it check all the lines from any text first then count the number of unique words?

[LB]

Add each word to the set and then display the size of the set?

[Josue Molina]

I would change your function's signature to

unsigned long countUWords(const string& s, set<string>& uw)

to pass it the set uw, instead of declaring it in the function.

[Sujing]

If I move it there, I get error:

error: too few arguments to function 'long unsigned int countUWords(const string&, std::set<std::basic_string<char> >&)'

What do I have to do to fix it? Sorry, I'm still pretty new to C++. Thanks for helping out though, really appreciate it.

[LB]

Did you edit your function call appropriately so that you give it the set as the second parameter? The error message suggests you didn't edit where you called the function.

[Sujing]

Ah, yes. I included that but it's still giving me wrong answers, larger numbers in fact. Maybe I need to change what is to be cout?

Edit: Yep, I had to change what was in my cout. Thanks for the help!!!