#include <string>
#include <fstream>

void help()
{
 cerr << "Usage: filename filename\n";
 exit(1);
}
string process(string tmp)
{
 static bool in_c_comment = false;

 if (!in_c_comment)
    {
     if (tmp.find("/") == string::npos)
        return tmp;
    }

 if (in_c_comment)
    {
     if (tmp.find("*/") == string::npos)
        return string();

     unsigned where = tmp.find("*/");

     in_c_comment = false;
     where += 2; // For the star ('*')

     if (where == tmp.size()) return string();

     string str(tmp, where, string::npos);
     return process(str);
    }


 bool in_string = false;

 for (unsigned position = 0; position < tmp.size(); position++)
     {
      if (tmp[position] == '\"' || tmp[position] == '\'')
         {
          if (in_string && tmp[position -1] != '\\')   // beware of: "\" still in string"
              in_string = false;
          if (!in_string)
              in_string = true;
          continue;
         }
     if (in_string)
        continue;

     if (tmp[position] == '/')
        {
         if (tmp[position +1] == '/') // C++ type comment
            {
             return string(tmp, 0, position);
            }

         if (tmp[position +1] == '*') // C type comment
            {
             in_c_comment = true;

             string str(tmp, 0, position);
             string str2(tmp, position +2, string::npos);

             return str + process(str2);
            }
        }
   }

 return tmp;
}



int main(int argc, char** argv)
{
 if (argc != 3 || !argv[1] || !argv[2])
    help();

 ifstream in(argv[1]);
 ofstream out(argv[2]);

 if (!in || !out)
    {
     cerr << "Error opening files!";
     exit(2);
    }


 string buf;

 while (getline(in,buf))
        out << process(buf) << '\n';

 return 0;
}