//	FileIO_b.cc

//	Switch between Standard-IO (terminal) and 
//		Input from a file
//		Output  to a file 


#include <iostream.h>
#include <fstream.h>		// needed for ifstream and ofstream

int main()
{
 int  n, tf;
 bool bf;
//			variables for IO streams
 istream  *myin;
 ostream  *myout; 
//			input file
 istream* infile  = new ifstream("in.txt");
//			output file
 ostream* outfile = new ofstream("out.txt");

//	Still standard IO
//	Decide whether terminal-IO or file-IO should be used
 cout << "Input from terminal/file - Press 0/1 : ";
 cin  >> tf;
 bf = (tf==1);
 
 if (bf) 
   {			// Remaining IO via file
     myin  = infile;
     myout = outfile;
   }
 else
   {			// Remaining IO via terminal
     myin  = &cin;
     myout = &cout;
   }
 
 
 (*myout) << "Input: ";
 (*myin)  >> n;
 
//			check
 
 (*myout) << endl;
 (*myout) << "Input was " << n << endl;
 (*myout) << endl;



 (*myout) << "This is an additional output" << endl;
  
 delete  outfile;	// don't forget
 delete  infile;

 return 0;
}