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C++で正規表現が使いたい

最初に

pythonでは正規表現re.subなんかを使うと簡単にテキストの中身が変えられちゃう!!  

regex

元も子もないがこっちを読んだ方が良い
標準C++ライブラリwikipedia

C++でしたい

      // "," の置換 
      string str5 = "0000,0001,0002";     // 置き換えたい文字列
      string okikawaru = ",";      // 文字列
      string okikaeru = " "; // 置換文字列
      if (!okikawaru.empty())
      {
         string::size_type post = 0;
         while ((post = str5.find(okikawaru, post)) != string::npos)
         {
            str5.replace(post, okikawaru.length(), ikikaeru);
            post += ikikaeru.length();
         }
      }

結果

0000 0001 0002

となる

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