// Example:  (really to show some basic loops)  v. 3/28/06
// Count the number of X's in a file.  (I don't have any
//   idea why).

#include <iostream.h>
#include <iomanip.h>
#include <fstream.h>

int main ()
{
	char Letter;
	int LetterCt=0;
	int XCt=0;
	double PerCent;
	fstream InFile;

	// Keep reading characters counting x's until a z is read.
	cout << "Enter some characters including at least one z" << endl;
	XCt = 0;
	InFile.open( "letters.txt", ios::in );
	while ( InFile >> Letter )
	{
		if ( Letter == 'z' )
			break;
		if ( Letter == 'x' )
			XCt++;
		LetterCt++;
	}
	cout << LetterCt << " Letters read." << endl;
	cout << XCt << " x's found." << endl;

	// Illustrate some mixed mode arithmetic.
	PerCent = XCt/LetterCt * 100;
	cout << setprecision( 5 ) << setw( 2 ) << PerCent <<
		" percent x's" << endl;
	
	PerCent = (float)XCt/LetterCt * 100;
	cout << setprecision( 5 ) << setw( 2 ) << PerCent <<
		" percent x's" << endl;
	
	PerCent = (XCt*1)/LetterCt * 100;
	cout << setprecision( 5 ) << setw( 2 ) << PerCent <<
		" percent x's" << endl;
		
	PerCent = (XCt*1.0)/LetterCt * 100;
	cout << setprecision( 5 ) << setw( 2 ) << PerCent <<
		" percent x's" << endl;

	return 0;
}