c++使用正则表达式提取关键字的方法

string text = "岳云鹏的对象叫铁锤";  regex pattern("(.*)的对象叫(.*)"); 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;  }  // 岳云鹏的对象叫铁锤 // 岳云鹏 // 铁锤

/* * 输入是789.123.456, 输出的是789 */void get(){ std::regex ip_reg("(.*)/.123/.456"); std::smatch matchResult;  string inputStr;  std::getline(std::cin,inputStr);  //正则匹配  if (std::regex_match(inputStr,matchResult,ip_reg))  {   cout << "Match: ";   //打印子表达式结果   for (size_t i = 1; i < matchResult.size(); ++i)   {    cout << matchResult[i] << " ";   }  }  else  {   cout << "Not Match!";  } }