/////////////////////////////////////////////////////////////////////
//  Marshalling.cpp - demonstrates how to convert a collection     //
//                    of doubles into a string and back again      //
//                                                                 //
//  Jim Fawcett, CSE691/791 - SW Modeling & Analysis, Fall 2001    //
/////////////////////////////////////////////////////////////////////

#include <iostream>
#include <sstream>
#include <string>

void main() {

  std::cout << "\n  Demonstrating Conversions Needed for Project #2 "
         << "\n =================================================\n";

  double stuff[4] = { 3.1415927, -3.33333e-5, 0, 1.2345e18 };

  // convert a collection of doubles to a string

  std::ostringstream convert;
  int i;
  for(i=0; i<3; i++)
    convert << stuff[i] << ", ";
  convert << stuff[3];
  std::string temp = convert.str();
  std::cout << "\n  string representation of doubles:\n\n  " 
            << temp << std::endl;

  // extract a collection of doubles from a string

  std::cout << "\n  Extracting doubles from string\n";
  double d;
  std::istringstream parse(temp);
  do {
    parse >> d;
  
    // the next few lines remove the comma and space
    // placed between doubles in the code above.
    // This only works for exactly that configuration,
    // e.g. comma seperated doubles

    if(!parse.good()) {
      parse.clear();     // force the stream state to good
      char junk;
      parse >> junk;     // get rid of comma
    }
    else
      std::cout << "\n  found double = " << d;
  } while(!parse.eof());

  std::cout << "\n  found double = " << d;
  
  std::cout << "\n\n";
}