COSC-111 Spring 2014

Project-1

February 13, 2014

Your assignment is to write a Python program that helps the user calculate how manydays he or she will need to recover from jetlag. Your program is due Mon, Feb-24, at11:59 pm. To turn it in, use the Submit server at app.cs.amherst.edu/Submit andsubmit two files:

1. Your file of Python code. Name it buley.py.

2. A trace file showing how your code works on a particular set of inputs. See the endof this handout for more information.

Buley’s Formula The International Civil Aviation Organization (ICAO) uses Buley’sformula to calculate how many days of rest a person (such as a pilot) needs to recover fromjet lag. The formula takes four inputs:

• T is the number of hours in transit

• z is the number of time zones crossed.

• dep is the local departure time.

• arr is the local arrival time.

Departure and Arrival times are used in this formula according to the 24-hour militaryclock. So 1200 is noon, 1430 is 2:30 pm, and so forth.

The times are used to find the departure coefficient d and the arrival coefficient aaccording to this table:

Time of day d = dept-coeff a = arr-coef

0800-1159 0 41200-1759 1 21800-2159 3 02200-0059 4 10100-0759 3 3

1

Where 0=good, 1,2 = fair, 3 = poor, and 4 = bad. If z ≥ 4 the formula is

days =T2 + (z − 4) + d + a

10

If z < 4 then the (z − 4) part should be set to zero in this formula.For full credit your program should:

1. Prompt the user for the necessary information.

2. Check for bad inputs and refused to do a wrong calculation if found (more about thisbelow).

This includes checking for invalid time, and checking that T and/or z are in reason-able ranges. if a bad input is detected, the program should print an error messageexplaining what the problem is, and invite the user to try again.

Your program does not have to check that the user typed in numbers (as opposedto strings) – in that case just let it crash. Your program does not have to checkfor sensible combinations of values (perhaps the pilot is flying around in circles ortraveling at the speed of light), just for invalid ranges of individual values. But youare welcome to add these checks if you can figure out how to do it.

3. Calculate how many days of rest are need to recover, according to the above formula.

4. Tell the user how many days of rest are needed. The program should round thisnumber up to the nearest half-day.

Example: The user leaves Montreal at 1800 hours local time (d = 3), spends ninehours travelling, and arrives in Paris at 0800 hours (a = 4), having crossed 5time zones.The number of days of rest needed is 1.25. Rounding up to the nearest half-day, theprogram prints the answer as 1.5 days.

Checking your work. A chart of world time zones is attached for your amusement.Here are some example inputs and the answers. Use these to check your work.

• The user travels 5 hours through 5 time zones, departing at 5 minutes after midnightand arriving 5 minutes after midnight. The answer should be 0.85, rounded up to 1day.

• The user travels 12 hours through 6 time zones, departing at 10pm and arriving at4am. The answer should be 1.5, rounded up to 1.5 days.

• The user travels 3 hours through 2 time zones, departing at 10 am and arriving at8pm. The answer is 0.15, rounded up to 0.5 days.

2

• The user travels 1 hour through 0 time zones (i.e. staying in the same time zone),departing at 11:30 pm and arriving at 12:30 am. The answer is 0.55 days, roundedup to 1 day.

What to turn in. As usual point your browser to www.cs.amherst.edu/Submit, findthe Program 1 submit page, and turn in the following two files.

1. The program buley.py, of course.

2. A file named proj1script.txt that is a transcript record of you (as user) interactingwith your program. You can make this script by running your program the usualway inside the IDLE shell (the interactive part), and then selecting File:Save As. . .in the menu bar.

(a) Your transcript should show your program running with the inputs from the“Checking your work” section above.

(b) Then, as user, you should type in some errors to show off how your programcopes with bad inputs. Use as many bad inputs as you need to demonstrateyour work.

Note: Do not try to edit the proj1script.txt file, for example to clean up typos anderrors that you might have created as user. You will not be penalized for being a clumsyuser. But, if you edit the file you may create mis-matches between what the script saysyour program does and what your program actually does. A professor who notices sucha mismatch will wonder if you’re trying to fake the output to get a better grade. You ofcourse do not want to alarm the professor and waste his or her time in that way.

3

105

30

75

0

30

0

30

150120

151515

60

45

45

15

45

135135 45

60

60

30

606060

120150 30

3030

75

75

45

105165

75

0 18090

45

90

1515

15 15

15

165

MACE.

TURKMENISTAN

POLAND

(AUSTL.)

LESOTHO

I N D I A

AFGHANISTAN

SWEDEN

(AUSTL.)

GHANA

U N I T E D S T A T E S

NEPAL

IRELAND

(AUSTL.)

C A N A D A

I N D O N E S I A

BOLIVIA

British IndianOcean Territory

BENIN

Svalbard

BURMA

(INDIA)

CENTRALAFRICAN REPUBLIC

LAOS

(U.K.)

GABON

DOM.REP.

(EQ. GUI.)

ANGOLA

HAITI

(SPAIN)

ZAMBIA

(U.S.)

JAMAICA

(PORT.)

TOGO

(France)

EL SALVADOR

Greenland

GUINEA-BISSAU

(U.K.)

PANAMA

KOS.

CHILE(AUSTL.)

BELIZE

KUWAIT

U.S.

MAURITANIA

MAURITIUS

HONDURAS

MALAWI

VANUATU

TANZANIA

(DENMARK)

VENEZUELA

(ECUADOR)

Am.Sam.

R U S S I A

BAHRAIN U.S.

(NORWAY)

SURINAME

(MAURITIUS)

TONGA

UNITED

SOUTHKOREA

(JA

PAN)

(FRANCE)

(FRANCE)

PORTUGAL

Taiwan

(IT.)

(FRANCE)

(Fr. S. and Ant. Lands)

PAPUANEW GUINEA

TURKEY

PHILIPPINES

(PORT.)

(CHILE)

PARAGUAY

(N.Z.)

MARSHALL

ISLANDS

UKRAINE

MONGOLIA

(BRAZIL)

UGANDA

MinamitoriShima

TIMOR-LESTE

AZER.

SRILANKA

Hong KongS.A.R.

(BRAZIL)

ZIMBABWE

Guam

K I R I B A T I

IRAQ

(COSTA RICA)

MOZAMBIQUE

(U.S.)

U.S.

SYRIA

LIBERIA

REP. OFTHE

CONGO

(CHILE)

YEMEN

(administered by U.K.claimed by ARGENTINA)

KINGDOM

BOS.&

(CHILE)

ERITREA

Bermuda

NETH.

AUS.

WakeIsland(U.S.)

(FRANCE)

ETHIOPIA

(FR.)

GREECE

HUNG.

Tokelau

BakerIsland

ALGERIA

(FRANCE)

HER.

CZ. REP.

K I R I B A T I

HowlandIsland

CHAD

NewCaledonia

ISRAEL

RUS.

(Mexico)

(N.Z.)

SUDAN

St. Pierreand Miquelon

OMAN

LAT.

(Fr. S. and Ant. Lands)

(AUSTL.)

CAPE VERDE

(N.Z.)

TAJIKISTAN

BEL.

(Fr. S. and Ant. Lands)

(SOUTH AFRICA)

NIGER

MacauS.A.R.

UZBEKISTAN

GERMANY

SER.

French Southern and Antarctic Lands

BURUNDI

A U S T R A L I A

PAKISTAN

FINLAND

Ashmore andCartier Islands

SWAZILAND

C H I N AI R A N

NORWAY

ChristmasIsland

CÔTED'IVOIRE

B R A Z I L

BHUTAN

MOROCCO

Cocos(Keeling)Islands

U.S.

VIETNAM

COLOMBIAMALDIVES

EQUATORIAL GUINEA

(YEMEN)

M A L A Y S I A

(INDIA)

ANG.

THAILAND

SEYCHELLES

NAMIBIA

South Georgia andSouth Sandwich Islands(administered by U.K.

claimed by ARGENTINA)

WesternSahara

SOUTHAFRICA

Falkland Islands(Islas Malvinas)

THEBAHAMAS

EGYPT

JarvisIsland

NICARAGUA

(NORWAY)

GUINEAClipperton IslandCOSTARICA

(DENMARK)

Pitcairn Islands

GUATEMALA

MONT.

ARGENTINA

SENEGAL

COMOROS

CUBA

QATAR

BRUNEI

KENYA

MALTA

ECUADOR

BURKINAFASO

SAMOA

MALI

occupied by the SOVIET UNION in 1945, administered by RUSSIA, claimed by JAPAN

FaroeIslands

PERU

Tromelin Island

TUVALU

ICELAND

UNITEDARAB

EMIRATES

NORTHWESTERNHAWAIIANISLANDS

Jan Mayen

Agalega Islands

NAURU

SPAINNORTHKOREA

(FR.)

TRINIDAD ANDTOBAGO

GUYANA

Reunion

NEWZEALAND

ITALY

CAMBODIA

(IT.)

FrenchGuiana

(N.Z.)

SOLOMONISLANDS

BELARUS

JAPAN

Saint Helena,Ascension,

andTristan da Cunha

(U.K.)

(BRAZIL)

URUGUAY

CookIslands

FEDERATED STATES OF MICRONESIA

ROMANIA

BANGLADESH

KAZAKHSTAN

(BRAZIL)

BOTSWANA

(JAPAN)

PALAU

GEO.

SIERRALEONE

DEM. REP.OF THECONGO

(COL.)

MADAGASCAR

(U.S.)

MEXICO

LEB.

(CHILE)

CAMEROON

NorthernMarianaIslands

DENMARK

CYPRUS

SAUDIARABIA

(CHILE)

SAO TOMEAND PRINCIPE

(U.K.)

LUX.

SWITZ.

JohnstonAtoll(U.S.)

F r e n c h P o l y n e s i a

DJIBOUTI

Coral SeaIslands

MOLDOVA

SLOV.

MidwayIslands

(U.S.)

(U.S.)

SOMALIA

Wal.& Fut.

ALB.

SLO.

(N.Z.)

(U.S.)

LIBYA

FIJI

CRO.

BULGARIA

(INDIA)

(U.S.)

SOUTHSUDAN

(AUSTL.)

JORDAN

LITH.

(French Polynesia)

(AUSTL.)

NIGERIA

SINGAPORE

ARM.

EST.

(Fr. S. and Ant. Lands)

(NORWAY)

THEGAMBIA

TUNISIA

KYRGYZSTAN

FRANCE

(Fr. S. and Ant. Lands)

(FRANCE)

RWANDA

1:0011:00

Saint Helena

NICOBAR

Annobon

Isla San Felix

Sun13:00

Corsica

ISLANDS

Niue

Isla Sala y Gómez

24:007:00

Sardinia

(number indicates standard timein zone when it is 12 noon, UTC) Heard Island and

McDonald Islands

Easter Island

Sun6:00

Sicily

NorfolkIsland

Lord HoweIsland

21:004:00

MADEIRAISLANDS

GALAPAGOSISLANDS

Gough Island

23:00

STANDARD TIME ZONES OF THE WORLD, AUGUST 2013

CANARYISLANDS

Sakhalin

WrangelIsland

14:00

Tasmania

subtract 24 hours

NEWSIBERIAN ISLANDS

12:00

ÎLES KERGUELEN

add 24 hours

SEVERNAYAZEMLYA

1:00

GILBERTISLANDS

TRISTAN DA CUNHA

KERMADECISLANDS

Boundary representation is not necessarily authoritative.

NOVAYAZEMLYA

16:00

Ascension

EAST

FRANZ JOSEFLAND

10:00

Add time zone number to UTC to obtain local time.

Scale 1:85,000,000 at 0º

WEST

22:00

Subtract time zone number from local time to obtain UTC.

Miller Cylindrical Projection

Sun

Island ofNewfoundland

8:00 00:00

HAWAIIANISLANDS

Socotra

ARCHIPIÉLAGOJUAN

FERNÁNDEZ

3:00

formerly Greenwich Mean Time (GMT)

LI N

E I S

LA

ND

S

ISLASREVILLAGIGEDO

Bouvet Island

15:00

Coordinated Universal Time (UTC)CHATHAMISLANDS

ÎLES MARQUISES

PRINCE EDWARDISLANDS

5:00

803569AI (G01802) 9-13Subtract time zone number from UTC to obtain local time.

Martin Vaz

ISLANDS

2:00

R Y U K Y U I

SL

AN

DS

Sun

Add time zone number to local time to obtain UTC.

Trinidade

ANDAMAN

19:00

A L E U T I A N I S L A N D S

PHOENIX ISLANDS

Île Saint-Paul

ARQUIPÉLAGO DEFERNANDO

DE NORONHA

LAKSHADWEEP

20:00

Île Amsterdam

PENEDOS DE SÃO PEDRO

E SÃO PAULO

18:00

ÎLES CROZET

Isla deMalpelo

AZORES

17:00

Westward across Date Line

Isla del Coco

Sun9:00

K U R I L IS L A

ND

S

Eastward across Date Line

Isla San Ambrosio

Sea ofJapan

Bering SeaLabrador

Sea

N O RTH

PA C IF I C

O C E A N

Kara Sea

AralSea

LakeBaikal

Barents Sea

SouthChina Sea

East Siberian Sea

I N D I A N

O C E A N

Baffin Bay

CaspianSea

PhilippineSea

Black Sea

Bay ofBengal

Greenland Sea

DavisStrait

S O UTH PA C IF I C

O C E A N

Sea

ArabianSea

Mediterranean Sea

N O RTH

ATL A NTI C

O C E A N

CoralSea

A R C T I C O C E A N

C ar ibb ean S ea

DenmarkStrait

Red

Great AustralianBight

MozambiqueChannel

Sea ofOkhotsk

Beaufort Sea

ChukchiSea

Gulf of Mexico

A R C T I C O C E A N

NorthSea

PersianGulf

TasmanSea

Gulf of Guinea

Laptev Sea

S O UTH

ATL A NTI C

O C E A N

ChukchiSea

LakeBalkhash

HudsonBay

NorwegianSea

N O RTH

PA C IF I C

O C E A N

+8

+3

+6

-4

-3

+5

+3

+5

-5

-4

+5¾

+5

+4

+4

-4

-5

+6½

+6

+3

+3

-4

-6

+5½

+8

0

+2

-3

-7

+5½

+9

+1

+1

0

-8

+9

+12

+1

-1

0

-9

+4½

+11

+2

0

-1

-10

+13

+5½

+10

+2

-2

-1

-11

+14

+5½

+9

+3

-3

-5

-11

-10

+13

+8

+5

-5

-6

-12

+13

+6

+7

+12

-8

-7

-3

+5

+6

+10

-4

-8

-11

+5

+11

-6

-9

-10

-10

-11

+12¾

-7

-3½

-12

-11

-11

-12

+11½

-9

+3

-11

+12

+10½

-10

+4

-10

+11

+6½

-11

+2

-9½

+9

-9

+10

+9½

+1

+10

+11

+9

-3

0

+4

+11

+8

-3

-3

-1

+3½

+7

+12

+7

-4½

-2

Inte

rnat

ion

al D

ate

Lin

e

Inte

rnat

ion

al D

ate

Lin

e

International Date Line

Sydney

Bangkok

Lagos

Kisangani

Perth

Taipei

Casablanca

Bogotá

AliceSprings

Khartoum

MexicoCity

Urumqi

Buenos Aires

Barcelona

Nairobi

Shanghai

Algiers

Seoul

Astana

Guangzhou

Kabul

Johannesburg

Tokyo

Beijing

Riyadh

Rome

Santiago

Yekaterinburg

Baghdad

Winnipeg

Yakutsk

Tehran

Vancouver

Vladivostok

Medan

Toronto

Samara

Makassar

Repulse Bay

SaintPetersburg

Jakarta

Québec

Caracas

Petropavlovsk-Kamchatskiy

NewDelhi

Iqaluit

Washington, D.C.

Novosibirsk

Mumbai

Edmonton

New York

Moscow

Kolkata

Dawson

Los Angeles

Magadan

Qaanaaq(Thule)

Ho ChiMinh City

Denver

Krasnoyarsk

Nuuk(Godthåb)

Rangoon

Dallas

Izhevsk

Ittoqqorttoormiit(Scoresbysund)

SãoPaulo

Chicago

Irkutsk

Paris

Manaus

Anchorage

Manila

AddisAbaba

Brasília

London

Lima

Cairo

Dhaka

Istanbul

Karachi

Kinshasa

0 500 1000 Kilometers

0 500 1000 Miles