Error when using function tolower

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0

I have a problem when calling the function tolower locale throws me the following error:

Error: "no matching function for call to 'tolower'

this is my code:

int main() 
{

   vector<string> text = load_vector(filename);

   sort(text.begin(), text.end());

   for (unsigned int i=0; i<text.size(); i++)
      text [i] = tolower (text[i], loc);

   return 0;
}

Because throws me this error?

asked 34 secs ago

cheroky

71

Error when using function tolower