//////////////////////////////////////////////////////////////////
//
//	printfilewords.cpp
//
//	Started by Jeff Ondich on 1/3/00
//	Last modified 2/16/00
//
//	This program retrieves words from a file specified by
//	the user and prints them, one per line, to cout.
//
//	Note that CleanWord might take the string it is 
//	given and clean it right out of existence.  What
//	could you change in main() to avoid printing empty
//	words?
//
//////////////////////////////////////////////////////////////////

#include	<fstream>
#include	<string>

void CleanWord( string& theWord );

int main( void )
{
	// Open the file requested by the user.
	string		fileName;
	cout << "What file do you want to process? ";
	cin >> fileName;

	ifstream	inputFile( fileName.c_str() );
	if( !inputFile.is_open() )
	{
		cout << "Can't open " << fileName
			<<  ".  Perhaps it doesn't exist." << endl;
		exit( 1 );
	}


	// Print out the words in the file.
	cout << "Here are the words in the file:" << endl;
	string		word;
	while( inputFile >> word )
	{
		CleanWord( word );
		cout << word << endl;
	}

	return( 0 );
}



//////////////////////////////////////////////////////////////////
//
//	CleanWord removes all non-alphabetic characters
//	from the given string (except for hyphens and
//	apostrophes), and reduces all upper case letters
//	to lower case.  Thus, once CleanWord is done, theWord
//	consists entirely of lower case letters, hyphens,
//	and apostrophes.
//
//////////////////////////////////////////////////////////////////

void CleanWord( string& theWord )
{
	string	s = "";
	int		originalLength = theWord.length();
	
	for( int i=0; i < originalLength; i++ )
	{
		char	c = theWord[i];
		if( isalpha(c)  ||  c == '\''  ||  c == '-' )
			s += tolower(c);
	}

	theWord = s;
}