Difference between revisions of "CSC111 Homework 6 Solution 2014"

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--[[User:Thiebaut|D. Thiebaut]] ([[User talk:Thiebaut|talk]]) 09:46, 26 March 2014 (EDT)
 
--[[User:Thiebaut|D. Thiebaut]] ([[User talk:Thiebaut|talk]]) 09:46, 26 March 2014 (EDT)
 
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There were several good solution programs for [[CSC111 Homework 6 Solution 2014| Homework 6]].  You were not required to use a '''main()''' function, although some did.  The program below is a good example of how Python programs should be organized, with a header first, possibly a few import statements, maybe a constant or two, then a long list of function definitons ('''def''' statements), then the definition of the '''main()''' function, and at the very end, one call to '''main()''' that starts the whole program.
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<onlydft>
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There were several good solution programs for [[CSC111 Homework 6 Solution 2014| Homework 6]].  You were not required to use a '''main()''' function, although some did.  The programs below were selected because they presented good features (not necessarily the same).  
  
 
<br />
 
<br />
 
=Program 1=
 
=Program 1=
 +
<br />
 +
The program below is a good example of how Python programs should be organized, with a header first, possibly a few import statements, maybe a constant or two, then a long list of function definitons ('''def''' statements), then the definition of the '''main()''' function, and at the very end, one call to '''main()''' that starts the whole program.
 
<br />
 
<br />
 
<source lang="python">
 
<source lang="python">
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# ==================================================================   
 
# ==================================================================   
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#                                                           MAIN PROGRAM
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#                           MAIN PROGRAM
 
# ==================================================================
 
# ==================================================================
 
# main()- set the visibility to be true and print the
 
# main()- set the visibility to be true and print the
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=Program 2=
 
=Program 2=
 
<br />
 
<br />
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This program gets points for good documentation and style.
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<source lang="python">
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# hw6a.py
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# Thuy Nguyen (ce)
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#
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# This program asks the user for an integer that will represent
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# a chessboard with that dimension. The chessboard uses a 3x3
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# block to represent each cell of the board.
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# For example, if user enters 3, this chessboard will be displayed:
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#                          ###...###
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#                          ###...###
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#                          ###...###
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#                          ...###...
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#                          ...###...
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#                          ...###...
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#                          ###...###
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#                          ###...###
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#                          ###...###
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# -----------------------------------------------------------------
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 +
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# Makes either black (###) or white (...) segment
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# for each cell
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def printBlock( visible ):
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    if visible==True:
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        print( "###", end="" )
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    else:
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        print( "...", end="" )
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 +
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# Makes indicated number of 3x3 cell(s) and alternates
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# black (###) and white (...) cells for each row
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def printLine( visibility, isOdd, dimension ):
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    for i in range( 3 ):
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        for i in range( dimension//2 ):
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            printBlock( visibility )
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            printBlock( not visibility )
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        if isOdd:
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            printBlock( visibility )
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        print()
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 +
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# Alternates black (###) and white (...) cells the number of
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# times that the user indicated for each column
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def repeatLine( dimension, isOdd ):
 +
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    for i in range( dimension//2 ):
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        printLine( True, isOdd, dimension )
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        printLine( False, isOdd, dimension )
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    if isOdd:
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        printLine( True, isOdd, dimension )
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 +
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def main():
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    # Asks user for dimension of chessboard
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    dimension = int( Input( "Enter dimension of board: " ) )
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    # Asks user again for another input
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    # if user enters negative number
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    while dimension < 0:
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        dimension = int( Input( "Invalid input. Please enter 0 or positive number: " ) )
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    # Boolean variable when dimension is
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    # odd for the for loops in functions
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    isOdd = dimension % 2 == 1
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    # prints chessboard
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    repeatLine( dimension, isOdd )
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 +
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main()
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</source>
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<br />
 +
 +
=Program 3=
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<br />
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This program was the shortest in the class.  Very tight, concise, and works well.  I prefer when the program contains more functions, but this one gets special reward for concise coding.
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<br />
 +
<source lang="python">
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# Claire Dudek (ah)
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# (slightly edited by D. Thiebaut)
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# 3/9/2014
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# Homework 6
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# hw6a.py
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# This program takes an input for the size of the grid
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# and then outputs that grid using a 3x3 of # or . for
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# each square in the grid
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# Prints one row of the board.  visible defines whether
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# the row starts with white or black cell.  Dim is the
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# dimension of the board, controlling the # of cells on
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# a row.
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def printRow(visible, dim):
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    for i in range (dim):
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        if visible==True:
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            print("###", end="")
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        if visible == False:
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            print("...", end="")
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        visible = not visible
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    print()
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# Prompts the user for a dimension, and then print the whole chessboard
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# on the screen.
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def main(visibility):
 +
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    # Input from user - cannot be less than 0
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    dim = -1
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    while dim <= -1:
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        dim = int( input("Enter dimension of board: "))
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    for i in range (dim):
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      printRow(visibility, dim)
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      printRow(visibility, dim)
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      printRow(visibility, dim)
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      visibility = not visibility
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 +
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# Makes the grid
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main(True)
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</source>
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<br />
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</onlydft>
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<br />
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<br />
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<br />
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<br />
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<br />
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<br />
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<br />
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<br />
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<br />
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[[Category:CSC111]][[Category:Python]][[Category:Homework]]

Latest revision as of 20:40, 9 January 2015

--D. Thiebaut (talk) 09:46, 26 March 2014 (EDT)


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