#include <iostream>
#include <fstream>
#include <cctype>
#include <string>

using namespace std;

char getAnswer(string OK)
{char choice;
 do {
  cin.get(choice);
  choice=toupper(choice);
 } while (OK.find(choice)<0);
 return(choice);
}

void OutputDirection(ofstream &Dest)
{string fileName;
 int done;
 do {
  done=1;   // Assume ok. Will be ok unless a device open fails
  cout << "Output Destination:\nS)creen   P)rinter    D)isk\n";
  cout.flush();
  switch (getAnswer("SPD")) {
   case 'S':
    Dest.open("/dev/console",ios::app);
    if (Dest.fail()) {
     cout << "Attempt to Attach to Screen Failed\n";
     done=0;
     Dest.close();
    }
    break;
   case 'P':
    Dest.open("prn");
    if (Dest.fail()) {
     cout << "Attempt to Attach to Printer Failed...Is Printer On Line?\n";
     done=0;
     Dest.close();
    }
    break;
   case 'D':
	cin.ignore();
    cout << "Enter Filename to Open >";
    cin >> fileName;
	cin.ignore(5,'\n');

    // Try to open for read to see if it's already there
	ifstream temp(fileName.c_str());
	if (temp) {
		cout << "File Exists! Overwrite? Y/N >";
		if (getAnswer("YN")=='N') {
			done=0;
		}
	}
	if (done) { // If we can create destination
		Dest.open(fileName.c_str(),ios::out);
		if (Dest.fail()) {
			cout << "Attempt to Open " << fileName << " Failed\n";
			done=0;
			Dest.close();
		}
	} // if done
  }
 } while (!done);
}

// Open a file for reading. If file not opened, return -1, else return 0
int OpenForRead(ifstream &Source)
{string filename;
 cout << "Enter File to Open >";
 cin >> filename;
 cin.ignore(); // eat CR
 Source.open(filename.c_str());
 if (Source.fail()) return(-1);
 return(0);
}

// Input a string from a stream, terminating when \n
//	is encountered. The terminator \n is discarded.
void fgetline(ifstream &Incoming,char Str[])
{int i=0;
 char Dummy;
 do {
  Incoming.get(Str[i]);
  i++;
 } while (Str[i-1] != '\n' && !Incoming.eof());
 Str[i-1]='\0';
}