C++11: Regex: Replacements

You can do regex replacements. Here is an example:

#include <iostream>
#include <regex>
#include <string>

int main(int argc, char * argv[])
{
  std::string   myString("abcdef");
  std::smatch   myMatches;
  std::regex    myRegex("(a)(b)(c)(d)(e)(f)");

  std::cout << std::regex_replace(myString, myRegex, "$6-$5-$4-$3-$2-$1")
            << std::endl;
  return 0;
}
// Output: f-e-d-c-b-a

Reference: http://www.cplusplus.com/reference/regex/regex_replace/