Difference between revisions of "CSC111 Homework 4 Solutions 2014"

From dftwiki3
Jump to: navigation, search
(Created page with "--~~~~ ---- =Problem 1= ==Version 1== <source lang="python"> #hw4a #Nicole Wong (bw) #Anna Render (bp) #(slightly edited by D. Thiebaut) # # Rock, Paper, Scissors game # The p...")
 
 
(3 intermediate revisions by the same user not shown)
Line 1: Line 1:
 
--[[User:Thiebaut|D. Thiebaut]] ([[User talk:Thiebaut|talk]]) 12:33, 6 March 2014 (EST)
 
--[[User:Thiebaut|D. Thiebaut]] ([[User talk:Thiebaut|talk]]) 12:33, 6 March 2014 (EST)
 
----
 
----
 +
<onlydft>
 +
 
=Problem 1=
 
=Problem 1=
 +
 
==Version 1==
 
==Version 1==
 
<source lang="python">
 
<source lang="python">
Line 79: Line 82:
  
 
</source>
 
</source>
 +
==Version 2==
 +
Another very good version:
 +
<source lang="python">
 +
# hw4a.py
 +
# Sarah Sutto-Plunz (bu)
 +
# This progam evaluates a user's input to play the game of rock, paper, scissors.
 +
# The computer randomly chooses one while the user is prompted to put an input.
 +
# The program will keep asking for an input as long as it is not R,P, or S.
 +
# The program keeps score of who is winning and prints it after each round.
 +
# The program continues to run until there is a difference of 3 between the scores
 +
# and then prints the final winner.
 +
 +
from random import choice
 +
from random import seed
 +
seed()
 +
 +
# declare score counters
 +
hcount = 0
 +
ccount = 0
 +
 +
# constants used in the game
 +
OPTIONS = [ 'R', 'P', 'S']
 +
USERWINS = "You win!"
 +
COMPUTERWINS = "I win!"
 +
 +
#--- while the score does not have a difference of three ---
 +
while abs(ccount-hcount) <3:
 +
    computer = choice( OPTIONS )
 +
    human    = input( "Your play? " ).upper().strip()
 +
 +
    #--- while the human puts in an incorrect input ---
 +
    while human != "R" and human != "S" and human != "P":
 +
        print ("Invalid input, please enter a new character (R,P, or S): ")
 +
        human    = input( "Your play? " ).upper().strip()
 +
 +
    #--- when the human enters the correct input ---
 +
    else:
 +
        print( "Your play: %s  Computer Play: %s" % ( human, computer ) )
 +
        if human==computer:
 +
            print( "It's a tie!" )
 +
        elif human == 'P' and computer =='R' \
 +
            or human == 'R' and computer =='S' \
 +
            or human == 'S' and computer =='P':
 +
            print( USERWINS )
 +
            hcount= hcount+1
 +
        else:
 +
            print( COMPUTERWINS )
 +
            ccount = ccount +1
 +
 +
#--- announces the winner when there is a difference of 3 between scores---
 +
if hcount> ccount:
 +
        print ("You're a winner!")
 +
else:
 +
        print ("Better luck next time!")
 +
 +
</source>
 +
=Problem #2=
 +
<source lang="python">
 +
# hw4b.py
 +
# Lujun Jian (bx)
 +
# 02/21/2014
 +
#
 +
# Magic Lily
 +
#
 +
# Assume that we have a put a magic lily in Paradise Pond. The magic lily grows
 +
# in surface every 24 hours. When we first put it in the pond, it is only 1
 +
# square inch in area. We approximate the size of the pond to be 31,416 square feet.
 +
# a program that uses a while loop and that outputs the number of days it will
 +
# take for the lily to cover the whole pond.
 +
 +
 +
# Initial size of magic lily(square inches)
 +
lilySize = 1
 +
 +
# Growth rate of magic lily
 +
growthRate= 2
 +
 +
# Pond size (square feet, given)
 +
pondSize= 31416
 +
 +
#Pond Size expressed in square inches (1 foot = 12 inches)
 +
pondSize= pondSize *12 * 12
 +
 +
# grow the lily until it covers the pond
 +
num=0
 +
while lilySize < pondSize :
 +
      num = num +1
 +
      lilySize = lilySize*2
 +
     
 +
# display results and all relevant information
 +
print("Magic Lily")
 +
print("Initial size: 1 square inch")
 +
print("Growth rate: 2 times its size in 1 day" )
 +
print("Pond size: %d square feet" % pondSize )
 +
print("Minimum number of days required to cover the whole pond (or more): %d days" % num)
 +
</source>
 +
 +
=Problem 3 (Optional)=
 +
==Version 1==
 +
This version by Emily uses more advanced features than we have seen so far, but it's a good introduction to what we'll be able to do soon...
 +
 +
<source lang="python">
 +
# hw4c.py
 +
# Emily Tizard (cn)
 +
# Extra Credit problem
 +
#
 +
# user will provide name of a city (Boston, NY, or Montreal)
 +
# followed by an integer number of degrees (temp)
 +
# which the program will average for each city and print.
 +
# program will stop prompting when user enters 'end'
 +
 +
 +
 +
# lists in which temperature data will be stored
 +
bTemps = [ ]
 +
nyTemps = [ ]
 +
mTemps = [ ]
 +
 +
# prompting the user for weather report
 +
 +
weather = Input( "Enter a city (Boston, New York, or Montreal) \
 +
followed by an integer temperature in degrees F, or 'end' to stop: " ).upper()
 +
 +
#while the user has not ended the program
 +
while weather != "END":
 +
   
 +
    if weather.find("BOSTON") != -1:
 +
        nWeather = weather.replace( "BOSTON", ' ', 1 )
 +
        nnWeather = int( nWeather.strip() )
 +
        bTemps.append( nnWeather ) # to add the weather data to list
 +
     
 +
    elif weather.find( "NEW YORK" ) != -1:
 +
        nWeather =weather.replace( "NEW YORK", ' ', 1 )
 +
        nnWeather = int( nWeather.strip() )
 +
        nyTemps.append( nnWeather )
 +
       
 +
    elif weather.find( "MONTREAL" ) != -1:
 +
        nWeather =weather.replace( "MONTREAL", ' ', 1 )
 +
        nnWeather = int( nWeather.strip() )
 +
        mTemps.append( nnWeather )
 +
       
 +
    weather = Input( "Any more weather data?" ).upper()
 +
 +
# to average the weather data
 +
# and print it to the user
 +
 +
if len( bTemps ) > 0:
 +
    print( "The average temperature in Boston is: %.2f " % ( sum( bTemps )/ len( bTemps ) ) )
 +
if len( nyTemps ) > 0:
 +
    print( "The average temperature in New York is: %.2f" % ( sum( nyTemps ) / len( nyTemps ) )  )
 +
if len( mTemps ) > 0:
 +
    print( "The average temperature in Montreal is: %.2f" % ( sum( mTemps ) / len( mTemps ) )  )
 +
 +
 +
</source>
 +
==Version 2==
 +
This version uses all the features we've seen so far.
 +
<source lang="python">
 +
# hw4c.py
 +
# Erika Earley (ar)
 +
# 2/25/14
 +
# Problem 3: gets input from keyboard about a city and temperature
 +
# and output average temeperature in each city
 +
 +
# define constant strings used in the program
 +
promptText = "Please enter temperature recording for Boston, New York or Montreal. Enter the word 'end' to stop."
 +
sentinel = "end"
 +
user = ""
 +
 +
# (X)sumtemps is the sum of all the temperatures entered for a given city
 +
# (X)numTemps is the number of entries given for a particular city
 +
BsumTemps = 0
 +
BnumTemps = 0
 +
MsumTemps = 0
 +
MnumTemps = 0
 +
NYsumTemps = 0
 +
NYnumTemps = 0
 +
 +
print(promptText)
 +
while user != sentinel :
 +
    user = Input('> ')
 +
    if user != sentinel:
 +
        user = user.lower().strip()
 +
        if user.find('boston') != -1:
 +
            Btemp = user.replace('boston','')
 +
            BsumTemps = BsumTemps + int(Btemp)
 +
            BnumTemps = BnumTemps + 1
 +
       
 +
        elif user.find('montreal') != -1:
 +
            Mtemp = user.replace('montreal','')
 +
            MsumTemps = MsumTemps + int(Mtemp)
 +
            MnumTemps = MnumTemps + 1
 +
         
 +
        elif user.find('new york') != -1:
 +
            NYtemp = user.replace('new york','')
 +
            NYsumTemps = NYsumTemps + int(NYtemp)
 +
            NYnumTemps = NYnumTemps + 1
 +
 +
# if the user did not reference a particular city at all, output
 +
# 'none entered' for that city.
 +
# compute and display average temperature for each city (allow 2 decimal places)
 +
 +
text = "Average temperature for"
 +
noEntry = "None Entered"
 +
 +
if BnumTemps != 0:
 +
    bostonAvg = BsumTemps / BnumTemps
 +
    print("%s %s: %.2f" % (text,"Boston",bostonAvg))
 +
else:
 +
    print("%s %s: %s" % (text,"Boston",noEntry))
 +
if MnumTemps != 0:
 +
    montrealAvg = MsumTemps / MnumTemps
 +
    print("%s %s: %.2f" % (text,"Montreal",montrealAvg))
 +
else:
 +
    print("%s %s: %s" % (text,"Montreal",noEntry))
 +
if NYnumTemps != 0:
 +
    newyorkAvg = NYsumTemps / NYnumTemps
 +
    print("%s %s: %.2f" % (text,"New York",newyorkAvg))
 +
else:
 +
    print("%s %s: %s" % (text,"New York",noEntry))
 +
 +
 +
 +
</source>
 +
<br />
 +
</onlydft>
 +
 +
<br />
 +
<br />
 +
<br />
 +
<br />
 +
<br />
 +
<br />
 +
<br />
 +
<br />
 +
<br />
 +
<br />
 +
[[Category:CSC111]][[Category:Python]][[Category:Homework]]

Latest revision as of 20:38, 9 January 2015

--D. Thiebaut (talk) 12:33, 6 March 2014 (EST)


...












Retrieved from "http://dominiquethiebaut.com/dftwiki3/index.php?title=CSC111_Homework_4_Solutions_2014&oldid=24842"