Count words in a string

Question

I need som help with counting words in a string s. count the number of words in a string s. Words are separated by whitespace. Has a sol

istringstream iss(s);
st         


        

Answer 1

It is also possible to use regular expressions:

   std::regex rx("(\\w+)(;|,)*");
   std::string text = "this;is,a;test";

   auto words_begin = std::sregex_iterator(text.begin(), text.end(), rx);
   auto words_end = std::sregex_iterator();

   auto count = std::distance(words_begin, words_end);

   std::cout << "count: " << count << std::endl;

   for(auto i = words_begin; i != words_end; ++i)
   {
      auto match = *i;
      std::cout << match[1] << '\n';
   }

The output is:

count: 4
this
is
a
test