Chap 7 
Problem 3

Fat calories and low fat

==Input==
Real fatGrams
Real calories

==Process==
percentageFat = (fatGrams * 9) / Calories

==Output==
if percentage < 0.3 then
	display "The food is low in fat"
else
	Display "The food is not low in fat"
end If

==Validate Input==
fatGrams > 0.0
calories > 0.0
not (calories > (fatGrams * 9))

==Pseudo Code for validate==

Module main
	Declare Real fatGrams, Calories = 0
	Declare Real fatCalc = 0
	
	Display "What is the number of grams of fat? "
	Input fatGrams
	
	if fatGrams < 0 Then
		Display "The number of grams from fat is less than zero"
	End If

	Display "What is the number of calories? "
	Input calories
	
	if calories < 0 Then
		Display "The number of grams from fat is less than zero"
	End If
		
	set fatCalc = fatGrams * 9;
	// Debug
	// Display "fat calc is ", fatCalc
	
	if not (calories > fatCalc) Then
		Display "The number of calories should be greater than the grams of fat times 9"
	End If
End Module

==Pseudo Code for simple program without validation==

Module main
	Declare Real fatGrams, Calories = 0
	Declare fatCalc = 0
	
	Display "What is the number of grams of fat? "
	Input fatGrams
	
	Display "What is the number of calories? "
	Input calories
	
	set percentageFat = (fatGrams * 9) / Calories
	
	// Output 
	if percentageFat < 0.3 then
		Display "The food is low in fat"
	else
		Display "The food is not low in fat!"
	end if
end module

==Pseudo Code for the whole she-bang!==

Module main

	Declare Real fatGrams, calories
	Declare Real fatCalc 
	Declare Real percentageFat
	Declare boolean test1, test2, test3, inputOk

	// prime our while loop
	set inputOk = false
	
	// Input 
	// validation loop
	while inputOk == false 

		// Initialize our three test variables to false
		set test1 = false
		set test2 = false
		set test3 = false
		
		Display "What is the number of grams of fat? "
		Input fatGrams
		
		if fatGrams < 0 Then
				Display "The number of grams from fat is less than zero"
				set test1 = false
		else
			set test1 = true
		end if

		Display "What is the number of calories? "
		Input calories
		
		if calories < 0 Then
				Display "The number of grams from fat is less than zero"
				set test2 = false
		else
			set test2 = true
		end if
			
		// the fat calc validation	
		set fatCalc = fatGrams * 9
		
		// debugging print statement
		// Display "fat calc is ', fatcalc 
		
		// Validate 
		if not (calories > fatCalc) Then
				Display "The number of calories should be greater than the grams of fat times 9"
				test3 = false
		else
			test3 = true
		end if
			
		if (test1 and test2 and test3) then
			set inputOk = true
		else
			set inputOk = false
		end if
			
	end While // while loop and input validation
	
	// Process Here
	set percentageFat = (fatGrams * 9 ) / calories
	
	// Output 
	if percentageFat < 0.3 then
		Display "The food is low in fat')
	else
		Display "The food is not low in fat!"
	end if
end module // main