c++ - Regex and Boost. Not working on a simple regex -

below following code

#include <iostream> #include <stdlib.h> #include <boost/regex.hpp> #include <string> using namespace std; using namespace boost;  int main() {      std::string s = "hello name bob";     boost::regex re("name");     boost::cmatch matches;      try{          // if (boost::regex_match(s.begin(), s.end(), re))         if (boost::regex_match(s.c_str(), matches, re)){              cout << matches.size();              // matches[0] contains original string.  matches[n]             // contains sub_match object each matching             // subexpression             (int = 1; < matches.size(); i++){                 // sub_match::first , sub_match::second iterators                 // refer first , 1 past last chars of                 // matching subexpression                 string match(matches[i].first, matches[i].second);                 cout << "\tmatches[" << << "] = " << match << endl;             }         }         else{             cout << "no matches(" << matches.size() << ")\n";         }     }     catch (boost::regex_error& e){         cout << "error: " << e.what() << "\n";     } } 

it outputs no matches.

im sure regex should work.

i used example

http://onlamp.com/pub/a/onlamp/2006/04/06/boostregex.html?page=3

from boost regex:

important

note result true if expression matches whole of input sequence. if want search expression somewhere within sequence use regex_search. if want match prefix of character string use regex_search flag match_continuous set.