//
// Filename:      pgm2_6a.cpp
//
// Description:   Demonstration of switch statement.
//
// ENSC 104:      Digital Computer Programming
//
// Instructor:    Dr. Walsh
//
// Section:       2
//
// Date Created:  02/18/98
// Last Modified: 02/18/98
//
// Name:          N/A
//

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

main()
   {
	char grade;
	int aCount = 0;
	int bCount = 0;
	int cCount = 0;
	int dCount = 0;
	int fCount = 0;
	int num_spaces = 0;
	int num_carriage_returns = 0;

	cout << "Enter the letter grades." << endl
	<< "Enter the EOF (Ctl-Z) character to end input." << endl;

	while ( ( grade = cin.get() ) != EOF )
		{
		switch (grade)
	 {
	 case 'A':
	 case 'a':  // Grade was uppercase A
		 ++aCount;         // or lowercase a.
		 break;

	 case 'B':
	 case 'b':  // Grade was uppercase B
		 ++bCount;         // or lowercase b.
		 break;

	 case 'C':
	 case 'c':  // Grade was uppercase C
		 ++cCount;         // or lowercase c.
		 break;

	 case 'D':
	 case 'd':  // Grade was uppercase D
		 ++dCount;         // or lowercase d.
		 break;

	 case 'F':
	 case 'f':  // Grade was uppercase F
		 ++fCount;         // or lowercase f.
		 break;

	 case '\n':  // Ignore the carriage return (ENTER)
		 ++num_carriage_returns;
		 break;

	 case ' ':   // Ignore spaces between entries.
		 ++num_spaces;
		 break;

	 default:             // catch all other characters
		 cout << "*** Incorrect letter grade entered. *** \n"
		 << "Enter a new grade." << endl;
		 break;

	 } // End switch statement

		} // End while loop

	cout << endl << "Totals for each letter grade are:"
	<< endl << "\tA: " << aCount
	<< endl << "\tB: " << bCount
	<< endl << "\tC: " << cCount
	<< endl << "\tD: " << dCount
	<< endl << "\tF: " << fCount << endl;

	cout << endl << "Total number of spaces: " << num_spaces << endl;
	cout << endl << "Total number of ENTER's: " << num_carriage_returns << endl;

	return 0;
	}