CashKWDR.rb

def getdue
	puts "What is the amount due?"	
	due = gets.chomp
	if  !( /^\d*\.?\d{0,2}/.match(due) )
		getdue
	end
	due.to_f
end

def gettend
	puts "What is the amount tendered?"
	tend = gets.chomp
	if  !(/^\d*\.?\d{0,2}/.match(tend))
			gettend
	end
	tend.to_f
end


due = getdue
tend = gettend


if due <= tend
	puts "=====Thank You!====="
	total = sprintf  "%.2f" , tend - due 
	puts "Change due is $#{total} "
	puts Time.now.strftime('%m/%d/%y   %l:%m%p')
	puts "=" *20
else
	total = sprintf  "%.2f" , due - tend
	puts "WARNING: Customer still owes $#{total}! Exiting..."
end

WOOT WOOT