// Demonstration of string steams and strstreams
#include <string>
#include <strstream>
//for strstreams
#include <sstream>
/* For stringstreams, NOT <stringstream> */
#include <iostream>
using namespace std;

/* A couple of useful functions from chapter 11 of  Horstmann CCC 2nd Edn.  Page 454.
   for converting doubles to strings and vice versa,  using a technique from chapter 10.

  Please copy, use, and say where these came from...

  Also modify to convert strings to and from int, float, long, ... data.
*/
double string_to_double(string s);
string double_to_string(double x);


main()
{
   //An istrstream is useful for extracting data from a character array
	char* data = "January 23, 1999";
	istrstream instr(data);
	string month;
	int day;
	string comma;
	int year;


	instr >> month >> day >> comma >> year;
	cout << month << ":" << day <<":"<< comma <<":" << year<< endl;


   // Extracting data from a C++ string
	istringstream instr2(string("February 24, 2004"));
	instr2 >> month >> day >> comma >> year;
	cout << month << ":" << day <<":"<< comma <<":" << year<< endl;

   //This shows making doubles into strings and vice versa
	cout << "1.2345 = " << double_to_string(1.2345) << endl ;

	cout << "1.0+1.0 = " << string_to_double("1.0")+string_to_double("1.0") << endl ;

	return 0;

}

double string_to_double(string s)
{
	istringstream instr(s);
	// OR istrstream instr(s.c_str()); /*notice the c_str()*/
	double x;
	instr >>x;
	return x;
}
string double_to_string(double x)
{
	ostringstream outstr;
	outstr << x;
	return outstr.str();
}