#	voteAMatic
#
#	This ghastly little electronic voting machine could be the
#	end of democracy as we know it.
#
#	Processing begins by asking the user for the number of
#	candidates in the election, and then requests the user to 
#	enter the name and party affiliation of each. This information
#	is stored in two lists.
#
#	In the next phase, the program enters a loop that runs
#	until a zero is entered. The program solicits a numeric choice
#	for candidate from the user (voter) and tallies the number
#	of votes each candidate gets.
#
#	The final phase begins after a zero entry is made. The program
#	prepares a report showing the number of votes and percentage
#	for each candidate, and then prints a histogram of the 
#	percentages.
#


#	loadSlate
#
#	given two empty lists, one for candidates and one for party affiliations,
#	this function askes the election officials to enter the number of
#	candidates and then their names and parties
#
#	names are space padded to 13 characters
#
def loadSlate ( name, party ):
	number = len(name)
	
	for i in range (number):
		name[ i ] = raw_input("Please enter the name of candidate " + str(i + 1) + ": ")
		party[ i ] = raw_input("Please enter " + name[i] + "'s party: ")
		
		for j in range (len(name[i]), 13):
			name[ i ] = name [ i ] + " "


		
#	holdElection
#
#	this function is given a list of candidates, a list of their party
#	affiliations, and a list for tallying votes. 
#	it solicits votes, tallies them, and returns the total number
#	of votes cast.
#
def holdElection(name, party, count):
	total = 0
	
	# build a prompt
	
	prompt = "Vote by entering the number of your chosen candidate.\n\n"
	
	for i in range (len(name)):
		prompt = prompt + str(i + 1) + "\t" + name[i] + "  (" + party[i] + ")\n"
	
	# get votes
	
	print prompt
	choice = input("Enter your vote: ")
	
	while choice > 0:
		if choice < len(name) + 1:
			count [choice - 1] = count[choice - 1] + 1
			total = total + 1
		
		print prompt
		choice = input("Enter your vote: ")

	return total
	

#	computeStats
#
#	given the total number of votes cast, the number of votes for each
#	candidate, and an empty array of percentages, compute the 
#	percent earned by each candidate (round to two)
#
def computeStats ( total, count, percentage ):
	
	for i in range( len (count) ):
		percentage [i] = round(count[i]*100.0/total,2)
		
		
		
#	reportResults
#	
#	this function is given the names and parties of all the candidates,
#	and the number of votes and percentage of votes earned by each
#	
#	it produces two reports: first a table showing each candidate's name
#	and the number and percentage of votes earned, and second a
#	histogram representing the percentage for each candidate
#
def reportResults ( name, party, count, percent ):
	print "\n\n=============== Election Results ===============\n"
	print "  Candidate\tParty\tVotes\tPercent\n\n"
	
	for i in range(len(name)):
		print name[i], "\t",party[i],"\t",count[i],"\t",percent[i]
		
	print "\n\n======= Histogram  =======\n\n"
	
	for i in range(len(name)):	# print histogram bars
		print name [i],
		print "|", "*" * int(round(percent[i]))


def main( ):
	
	number = input ("Please enter the number of candidates: ")
	
	candidate = [" "] * number
	party = [" "] * number
	
	loadSlate (candidate, party)
	slateSize = len(candidate)
	
	voteCount = [0] * slateSize
	percentage = [0.0] * slateSize
	
	totalVotes = holdElection ( candidate, party, voteCount)
	
	computeStats ( totalVotes, voteCount, percentage )
	
	reportResults ( candidate, party, voteCount, percentage )
	
main ( )