// URL that generated this code:
// http://txt2re.com/index-c++.php3?s=42%2043&2
#include <stdlib.h>
#include <string>
#include <iostream>
#include <pme.h>
int main()
{
  std::string txt="42 43";
  std::string re1=".*?";	// Non-greedy match on filler
  std::string re2="\\d+";	// Uninteresting: int
  std::string re3=".*?";	// Non-greedy match on filler
  std::string re4="(\\d+)";	// Integer Number 1
  PME re(re1+re2+re3+re4,"gims");
  int n;
  if ((n=re.match(txt))>0)
  {
      std::string int1=re[1].c_str();
      std::cout << "("<<int1<<")"<< std::endl;
  }
}
//-----
// C++ does not provide a regular expression feature as standard.
//
// To run this code you will need to first download and install
// the PCRE library from http://www.pcre.org/ and 
// the PME library from ftp://ftp.csx.cam.ac.uk/pub/software/programming/pcre/Contrib/
// 
// Note that on Linux systems PCRE is often already installed in /usr/lib/libpcre* or /usr/local/lib/libpcre*. 
//
// Compile and run on Unix using 
// # c++ x.cpp -lpme -lpcre 
// # ./a.out
//