/*
ACTION 6-2 (ACT06_01.CPP)

 OUTPUT: THE PROGRAM MUST DISPLAY THE
 LOGICAL RESULT OF THE NAND OPERATION

 INPUT: THE USER MUST ENTER BOOLEAN VALUES FOR
 THE INPUT VARIABLES, A AND B.

 PROCESSING: A NAND B = NOT (A AND B) = ! (A && B)
*/

//PREPROCESSOR DIRECTIVES
#include <iostream.h>	//FOR cin AND cout

//MAIN FUNCTION
int main()
{
//DECLARE BOOLEAN ENUMERATED CLASS
  enum BOOL {FALSE,TRUE};

	//DEFINE VARIABLES
	char entry = ' ';				// USER ENTRY
	BOOL NAND = FALSE;			// RESULT OF NAND OPERATION
	BOOL A = FALSE;					// BOOLEAN VALUE
	BOOL B = FALSE;					// BOOLEAN VALUE

	//DISPLAY PROGRAM DESCRIPTION MESSAGE
	cout <<	"\nThis program will generate a NAND (not AND) result\n"
			 << "from two BOOL values that you must enter. " << endl << endl;

	//GET USER INPUT FOR FIRST BOOLEAN VARIABLE
	 cout << "Enter a Boolean value (T for TRUE or F for FALSE)" << endl;
	 cin >>  entry;

	//TEST USER INPUT FOR TRUE OR FALSE AND
	//MAKE BOOLEAN ASSIGNMENT
	if ((entry == 'T') || (entry == 't'))
		 A = TRUE;
	else
		 A = FALSE;

	//GET USER INPUT FOR SECOND BOOLEAN VARIABLE
	cout << "Enter a Boolean value (T for TRUE or F for FALSE)" << endl;
	cin >>  entry;

	//TEST USER INPUT FOR TRUE OR FALSE AND
	//MAKE BOOLEAN ASSIGNMENT
	if ((entry == 'T') || (entry == 't'))
		 B = TRUE;
	else
		 B = FALSE;

	//DETERMINE NAND RESULT
	NAND = !(A && B);

	//TEST NAND RESULT FOR TRUE OR FALSE AND DISPLAY RESULT
	if (NAND == TRUE)
		 cout << "\n\nThe NAND result is:  TRUE" << endl;
	else
		 cout << "\n\nThe NAND result is:  FALSE" << endl;

	//RETURN
  return 0;
} //END main()