string text = "岳云鵬的對象叫鐵錘";  regex pattern("(.*)的對象叫(.*)"); smatch results;  if (regex_match(text, results, pattern)) {   for (auto it = results.begin(); it != results.end(); ++it)    cout << *it << endl;  }  else {   cout << "match failed: " << text << endl;  }  // 岳云鵬的對象叫鐵錘 // 岳云鵬 // 鐵錘

/* * 輸入是789.123.456, 輸出的是789 */void get(){ std::regex ip_reg("(.*)/.123/.456"); std::smatch matchResult;  string inputStr;  std::getline(std::cin,inputStr);  //正則匹配  if (std::regex_match(inputStr,matchResult,ip_reg))  {   cout << "Match: ";   //打印子表達式結果   for (size_t i = 1; i < matchResult.size(); ++i)   {    cout << matchResult[i] << " ";   }  }  else  {   cout << "Not Match!";  } }