Difference between revisions of "CSC111 Homework 4 Solutions 2014"

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--[[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)
 
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<onlydft>
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=Problem 1=
 
=Problem 1=
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==Version 1==
 
==Version 1==
 
<source lang="python">
 
<source lang="python">
Line 135: Line 138:
  
 
</source>
 
</source>
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=Problem #2=
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<source lang="python">
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# hw4b.py
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# Lujun Jian (bx)
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# 02/21/2014
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#
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# Magic Lily
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#
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# Assume that we have a put a magic lily in Paradise Pond. The magic lily grows
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# in surface every 24 hours. When we first put it in the pond, it is only 1
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# square inch in area. We approximate the size of the pond to be 31,416 square feet.
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# a program that uses a while loop and that outputs the number of days it will
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# take for the lily to cover the whole pond.
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 +
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# Initial size of magic lily(square inches)
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lilySize = 1
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# Growth rate of magic lily
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growthRate= 2
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# Pond size (square feet, given)
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pondSize= 31416
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#Pond Size expressed in square inches (1 foot = 12 inches)
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pondSize= pondSize *12 * 12
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# grow the lily until it covers the pond
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num=0
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while lilySize < pondSize :
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      num = num +1
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      lilySize = lilySize*2
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# display results and all relevant information
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print("Magic Lily")
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print("Initial size: 1 square inch")
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print("Growth rate: 2 times its size in 1 day" )
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print("Pond size: %d square feet" % pondSize )
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print("Minimum number of days required to cover the whole pond (or more): %d days" % num)
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</source>
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=Problem 3 (Optional)=
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==Version 1==
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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...
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<source lang="python">
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# hw4c.py
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# Emily Tizard (cn)
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# Extra Credit problem
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#
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# user will provide name of a city (Boston, NY, or Montreal)
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# followed by an integer number of degrees (temp)
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# which the program will average for each city and print.
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# program will stop prompting when user enters 'end'
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# lists in which temperature data will be stored
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bTemps = [ ]
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nyTemps = [ ]
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mTemps = [ ]
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# prompting the user for weather report
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weather = Input( "Enter a city (Boston, New York, or Montreal) \
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followed by an integer temperature in degrees F, or 'end' to stop: " ).upper()
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#while the user has not ended the program
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while weather != "END":
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    if weather.find("BOSTON") != -1:
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        nWeather = weather.replace( "BOSTON", ' ', 1 )
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        nnWeather = int( nWeather.strip() )
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        bTemps.append( nnWeather ) # to add the weather data to list
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    elif weather.find( "NEW YORK" ) != -1:
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        nWeather =weather.replace( "NEW YORK", ' ', 1 )
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        nnWeather = int( nWeather.strip() )
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        nyTemps.append( nnWeather )
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    elif weather.find( "MONTREAL" ) != -1:
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        nWeather =weather.replace( "MONTREAL", ' ', 1 )
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        nnWeather = int( nWeather.strip() )
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        mTemps.append( nnWeather )
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    weather = Input( "Any more weather data?" ).upper()
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# to average the weather data
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# and print it to the user
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if len( bTemps ) > 0:
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    print( "The average temperature in Boston is: %.2f " % ( sum( bTemps )/ len( bTemps ) ) )
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if len( nyTemps ) > 0:
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    print( "The average temperature in New York is: %.2f" % ( sum( nyTemps ) / len( nyTemps ) )  )
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if len( mTemps ) > 0:
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    print( "The average temperature in Montreal is: %.2f" % ( sum( mTemps ) / len( mTemps ) )  )
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 +
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</source>
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==Version 2==
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This version uses all the features we've seen so far.
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<source lang="python">
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# hw4c.py
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# Erika Earley (ar)
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# 2/25/14
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# Problem 3: gets input from keyboard about a city and temperature
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# and output average temeperature in each city
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# define constant strings used in the program
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promptText = "Please enter temperature recording for Boston, New York or Montreal. Enter the word 'end' to stop."
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sentinel = "end"
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user = ""
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# (X)sumtemps is the sum of all the temperatures entered for a given city
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# (X)numTemps is the number of entries given for a particular city
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BsumTemps = 0
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BnumTemps = 0
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MsumTemps = 0
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MnumTemps = 0
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NYsumTemps = 0
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NYnumTemps = 0
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print(promptText)
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while user != sentinel :
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    user = Input('> ')
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    if user != sentinel:
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        user = user.lower().strip()
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        if user.find('boston') != -1:
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            Btemp = user.replace('boston','')
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            BsumTemps = BsumTemps + int(Btemp)
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            BnumTemps = BnumTemps + 1
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        elif user.find('montreal') != -1:
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            Mtemp = user.replace('montreal','')
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            MsumTemps = MsumTemps + int(Mtemp)
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            MnumTemps = MnumTemps + 1
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        elif user.find('new york') != -1:
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            NYtemp = user.replace('new york','')
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            NYsumTemps = NYsumTemps + int(NYtemp)
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            NYnumTemps = NYnumTemps + 1
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# if the user did not reference a particular city at all, output
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# 'none entered' for that city.
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# compute and display average temperature for each city (allow 2 decimal places)
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text = "Average temperature for"
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noEntry = "None Entered"
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if BnumTemps != 0:
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    bostonAvg = BsumTemps / BnumTemps
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    print("%s %s: %.2f" % (text,"Boston",bostonAvg))
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else:
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    print("%s %s: %s" % (text,"Boston",noEntry))
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if MnumTemps != 0:
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    montrealAvg = MsumTemps / MnumTemps
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    print("%s %s: %.2f" % (text,"Montreal",montrealAvg))
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else:
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    print("%s %s: %s" % (text,"Montreal",noEntry))
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if NYnumTemps != 0:
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    newyorkAvg = NYsumTemps / NYnumTemps
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    print("%s %s: %.2f" % (text,"New York",newyorkAvg))
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else:
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    print("%s %s: %s" % (text,"New York",noEntry))
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</source>
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<br />
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</onlydft>
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[[Category:CSC111]][[Category:Python]][[Category:Homework]]

Latest revision as of 21:38, 9 January 2015

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


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