#include <iostream>
#include <string>
#include <cstring>
#include <fstream>

using namespace std;

void DoCat(istream & in, ostream & out, bool asint);
void Usage(string progname) {
   cout << progname << ":"  << endl;
   cout << "\t --infile filename: specify the input file name" << endl;
   cout << "\t -i filename: specify the input file name" << endl;
   cout << "\t --outfile filename: specify the output file name" << endl;
   cout << "\t -o filename: specify the output file name" << endl;
   cout << "\t --help, ? : help" << endl;
   cout << endl;

   return ;
}

int main(int argc, char * argv[]){
   bool readFromStdin{true};
   bool writeToStdout{true};
   ifstream inFile;
   ofstream outFile;

   istream * in = & cin;
   ostream * out = & cout;

   bool intDump{false};
   string inFileName, outFileName;

   int i;

   i = 1;
   while (i < argc) {
      if ( !strcmp(argv[i],"--infile") or !strcmp(argv[i], "-i")) {
          ++i;
          if (i < argc) {
             inFileName = argv[i];
             ++i;
             readFromStdin = false;
          } else {
             cerr << "Error: no input file name give" << endl;
             Usage(argv[0]);
          }
      } else if ( !strcmp(argv[i],"--outfile") or !strcmp(argv[i], "-o")) {
          ++i;
          if (i < argc) {
             outFileName = argv[i];
             ++i;
             writeToStdout = false;
          } else {
             cerr << "Error: no output file name give" << endl;
             Usage(argv[0]);
          }
      } else if ( !strcmp(argv[i],"--help") or !strcmp(argv[i], "?")) {
          Usage(argv[0]);
          ++i;
      } else if ( !strcmp(argv[i],"--int") or !strcmp(argv[i], "-d")) {
          intDump = true;
          ++i;
      } else {
         cerr << "Unknown argument: " << argv[i] << endl;
         Usage(argv[0]);
         ++i;
      }
   }

   if (!readFromStdin) {
      inFile.open(inFileName);
      readFromStdin = !inFile;
      in = & inFile;
   }

   if (!writeToStdout) {
      outFile.open(outFileName);
      writeToStdout = !outFile;
      out = & outFile;
   }

   DoCat(*in, *out, intDump);

   return 0;
}

void DoCat(istream & in, ostream & out, bool intDump){
   char letter;

   letter = in.get();
   while(in) {
      if (intDump) {
          out << static_cast<int>(letter);
      } else {
          out << letter;
      }
      letter = in.get();
   }
}