Java程序辅导

DASC	1204	–	Programming	Project	2	
Due	Date	–	02/07/2022	at	11:59pm		
1.	Problem	Statement:		The	purpose	of	this	programming	assignment	is	to	give	students	experience	with	input/output	commands	and	conditional	statements	in	Java.	Your	task	is	to	implement	the	user	interface	for	customers	at	“John’s	Restaurant.”	Instead	of	listing	food	items	on	their	menu,	the	chef	asks	each	customer	about	their	budget	and	food	preferences.	Using	this	information,	the	restaurant	will	cook	and	deliver	a	unique	meal	for	each	customer.			
	
	
User	Input		Your	first	task	is	to	ask	the	user	a	series	of	questions	to	find	out	what	types	of	food	they	like	and	dislike.	In	particular,	you	should	ask	the	user	the	following	questions	and	save	their	answers.		
• How	much	do	you	like	meat	on	scale	of	1..100?	
• How	much	do	you	like	vegetables	on	a	scale	of	1..100?	
• How	much	do	you	like	pasta	on	a	scale	of	1..100?	
• How	much	do	you	like	potatoes	on	a	scale	of	1..100?	
• How	much	do	you	like	chocolate	on	a	scale	of	1..100?	
• How	much	do	you	like	fruit	on	a	scale	of	1..100?	
• What	is	your	budget	(before	tax)	for	this	meal?		
Choosing	the	Appetizer		Your	next	task	is	to	use	the	information	above	to	decide	which	appetizer	to	make	for	the	customer.	The	three	appetizer	options	are:		
• Chicken	wings	(prefers	meat)	
• Garden	salad	(prefers	vegetables)	
• Garlic	bread	(does	not	like	meat	or	vegetables)		If	the	before	tax	budget	is	under	$15	the	customer	should	not	get	an	appetizer.	To	select	which	appetizer	to	cook,	the	chef	compares	the	meat	and	vegetable	preferences.	If	they	are	both	small	(under	20)	the	customer	will	get	Garlic	bread.	If	
the	meat	score	is	greater	than	the	vegetable	score,	the	customer	will	get	Chicken	wings.	Otherwise	they	will	get	a	Garden	salad.		
Choosing	the	Main	Course		Your	next	task	is	to	use	the	information	above	to	decide	which	main	course	to	make	for	the	customer.	The	four	main	course	options	are:		
• Steak	and	baked	potato	(prefers	meat	and	potatoes)	
• Spaghetti	and	meat	sauce	(prefers	meat	and	pasta)	
• Pasta	primavera	(prefers	vegetables)	
• Cheese	omelet	(does	not	like	meat,	vegetables,	potatoes,	or	pasta)		If	the	before	tax	budget	is	under	$10	the	customer	should	not	get	a	main	course.	To	select	which	main	course	to	cook,	the	chef	compares	the	meat,	vegetable,	pasta	and	potato	preferences.	If	all	four	are	very	small	(under	10)	the	customer	will	get	a	Cheese	omelet.	If	the	customer	prefers	meat	over	vegetables,	they	will	either	Steak	or	Spaghetti	depending	on	their	potato/pasta	preference.	If	the	customer	prefers	vegetables	over	meat,	they	will	get	Pasta	primavera.		
	
Choosing	the	Dessert		Your	next	task	is	to	use	the	information	above	to	decide	which	dessert	to	make	for	the	customer.	The	three	dessert	options	are:		
• Chocolate	cake	(prefers	chocolate)	
• Apple	pie	(prefers	fruit)	
• Vanilla	ice	cream	(does	not	like	chocolate	or	fruit)		If	the	before	tax	budget	is	under	$20	the	customer	should	not	get	a	dessert.	To	select	which	dessert	to	prepare,	the	chef	compares	the	chocolate	and	fruit	preferences.	If	both	are	small	(under	20)	the	customer	will	Vanilla	ice	cream.	If	the	chocolate	score	is	greater	than	the	fruit	score,	the	customer	will	get	Chocolate	cake.	Otherwise	they	will	get	an	Apple	pie.	
	
Program	Output	
	Your	final	task	is	to	print	out	the	list	of	food	items	automatically	selected	by	the	chef	for	the	customer	and	calculate	and	print	the	bill	for	the	meal.	Each	appetizer	costs	$5,	each	main	course	costs	$10,	and	each	dessert	costs	$5.	After	you	total	these	items,	you	should	add	7%	sales	tax	to	get	the	final	amount	owed	for	the	meal.	
	
	 	
2.	Design:			Your	first	design	task	is	to	decide	what	messages	to	print	for	the	user,	and	how	to	read	and	store	their	answers	in	variables.	If	the	user	input	is	out	of	the	specified	range,	you	should	“correct”	the	value	for	the	user	and	proceed.	For	example,	if	one	of	the	customer’s	preferences	is	less	than	1,	you	should	set	the	value	to	1.			Your	next	design	task	is	to	work	out	what	sequence	of	nested	if-else	statements	are	needed	to	select	the	appetizer,	main	course,	and	dessert	options	based	on	the	customer	preferences.	You	may	want	to	work	out	the	logic	for	the	appetizer	or	dessert	first,	and	once	you	have	that	figured	out,	work	on	the	logic	for	the	main	course.			Your	final	design	task	is	to	decide	how	to	print	the	list	of	food	items	and	the	bill	for	the	meal.	In	order	to	do	this,	you	may	need	to	create	some	additional	variables	that	keep	track	of	the	food	choices	and	costs	for	each	food	item	the	chef	selects.	
	
3.	Implementation:		Since	you	are	starting	with	a	"blank	piece	of	paper"	to	implement	this	project,	it	is	very	important	to	develop	your	code	incrementally	writing	comments,	adding	code,	compiling,	debugging,	a	little	bit	at	a	time.	This	way,	you	always	have	a	program	that	"does	something"	even	if	it	is	not	complete.		As	a	first	step,	it	is	always	a	good	idea	to	start	with	an	empty	main	function	and	add	the	code	to	read	input	data	from	the	user,	and	then	simply	print	these	values	back	out	again.	Once	this	part	is	working,	you	can	start	performing	calculations	with	the	input	data.	
	
4.	Testing:		Test	your	program	to	check	that	it	operates	correctly	for	all	requirements	listed	above.	To	verify	that	you	are	calculating	the	output	values	correctly,	you	should	try	a	variety	of	input	values	and	check	your	answers	by	hand.	You	should	SAVE	your	program	output	to	include	in	your	project	report.		You	are	not	required	to	add	error	checking	for	invalid	inputs	in	this	program,	but	it	is	always	good	to	test	a	program	to	see	what	happens	to	your	program	if	the	user	inputs	unexpected	data	(like	a	negative	number	or	“hello	mom”).	You	should	cut/paste	these	results	into	your	project	report	to	document	what	your	program	does	in	these	cases.		
5.	Documentation:		When	you	have	completed	your	Java	program,	write	a	short	report	using	the	“Programming	Project	Report	Template”	describing	what	the	objectives	were,	what	
you	did,	and	the	status	of	the	program.	Does	it	work	properly	for	all	test	cases?	Are	there	any	known	problems?	Save	this	project	report	in	a	separate	document	to	be	submitted	electronically.	
	
6.	Project	Submission:		When	you	have	your	midpoint	code	ready	to	submit,	go	to	the	Blackboard	project	description	page	and	submit	your	program	(as	a	.java	file).	You	do	not	need	to	upload	project	documentation	for	the	midpoint.	When	you	have	completed	the	programming	project,	upload	your	final	program	(as	a	.java	file)	and	your	project	documentation	(as	a	.docx	or	.pdf	file).			The	dates	on	your	electronic	submission	will	be	used	to	verify	that	you	met	the	due	date	above.	All	late	projects	will	receive	reduced	credit:		 10%	off	if	less	than	1	day	late,	20%	off	if	less	than	2	days	late,	30%	off	if	less	than	3	days	late,	no	credit	if	more	than	3	days	late.			You	will	receive	partial	credit	for	all	programs	that	compile	even	if	they	do	not	meet	all	program	requirements,	so	handing	projects	in	on	time	is	highly	recommended.		
7.	Academic	Honesty	Statement:		Students	are	expected	to	submit	their	own	work	on	all	programming	projects,	unless	group	projects	have	been	explicitly	assigned.	Students	are	NOT	allowed	to	distribute	code	to	each	other	or	copy	code	from	another	individual	or	website.	Students	ARE	allowed	to	use	any	materials	on	the	class	website,	or	in	the	textbook,	or	ask	the	instructor	and/or	GTAs	for	assistance.		This	course	will	be	using	highly	effective	program	comparison	software	to	calculate	the	similarity	of	all	programs	to	each	other,	and	to	homework	assignments	from	previous	semesters.	Please	do	not	be	tempted	to	plagiarize	from	another	student.		Violations	of	the	policies	above	will	be	reported	to	the	provost’s	office	and	may	result	in	a	ZERO	on	the	programming	project,	an	F	in	the	class,	or	suspension	from	the	university,	depending	on	the	severity	of	the	violation	and	any	history	of	prior	violations.