///////////////////////////////////////////////////////
//
//	files.cpp
//
//	Started 2/16/98 by Jeff Ondich
//	Last modified: 5/12/98
//
//	This program illustrates, very briefly, the
//	use of the ifstream class to read from a file,
//	and the ofstream class to write to a file.
//
////////////////////////////////////////////////////////

#include	<astra.h>

// Allows use of ifstream and ofstream
#include	<fstream.h>

// Prototypes.

void InputFileExample( void );
void OutputFileExample( void );

int main( void )
{
	InputFileExample();
	OutputFileExample();
	return( 0 );
}

////////////////////////////////////////////////////////
//	Gets a file name from the user, reads the
//	words from the file and prints them, one per
//	line, to cout.  If the file named by the user
//	does not exist, an error message is printed
//	and the program halts.
////////////////////////////////////////////////////////

void InputFileExample( void )
{
	// Get the file name from the user.
	char	fileName[100];

	cout << "From which file would you like to read? ";
	cin >> fileName;


	// Declare an ifstream object with fileName as
	// a constructor parameter to attempt to open
	// the named file.  Check to make sure it
	// was opened successfully.

	ifstream	myFile( fileName );
	if( !(myFile.is_open()) )
	{
		cout << "Trouble opening " << fileName << endl;
		exit(1);
	}


	// Read words one at a time from the file, and
	// print them out, one per line.  Note that the
	// "fail()" member function of the ifstream type
	// is used to test for end-of-file.  The end of
	// file is reached only after an attempt to read
	// past the last character.

	string	word;
	
	myFile >> word;
	while( !myFile.fail() )
	{
		cout << word << endl;
		myFile >> word;
	}


	// Clean up after yourself.
	myFile.close();
}


////////////////////////////////////////////////////////
//	Gets a file name from the user and writes a
//	foolish message into the file.  If opening the
//	file fails, the program halts.
////////////////////////////////////////////////////////

void OutputFileExample( void )
{
	// Get the file name from the user.
	char	fileName[100];

	cout << "To which file would you like to write? ";
	cin >> fileName;


	// Declare an ofstream object with fileName as
	// a constructor parameter to attempt to open
	// the named file.  Check to make sure it
	// was opened successfully.

	ofstream	myFile( fileName );
	if( !(myFile.is_open()) )
	{
		cout << "Trouble opening " << fileName << endl;
		exit(1);
	}

	// Write something to the file.
	
	myFile << "Nurse, I spy gypsies. Run!" << endl;
	myFile << "Ma, I say!  Lee's as eely as I am!" << endl;
	myFile << "Satan, oscillate my metallic sonatas." << endl;
	myFile << "Go hang a salami.  I'm a lasagna hog." << endl;
	myFile << "Flee to me, remote elf." << endl;

	// Clean up after yourself.
	myFile.close();
}