Difference between revisions of "CSC111 Programming Examples Week 2"
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:* Also known is class average, as a number (0-100). | :* Also known is class average, as a number (0-100). | ||
:* Display student information in a box, and horizontal bar graph of 2 grades. | :* Display student information in a box, and horizontal bar graph of 2 grades. | ||
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(The class average is set by the program, internally. The value used here in 80.) | (The class average is set by the program, internally. The value used here in 80.) | ||
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=Decomposition= | =Decomposition= | ||
Revision as of 20:12, 7 February 2015
--D. Thiebaut (talk) 09:12, 6 February 2015 (EST)
Contents
Problem
Here's a problem, below. Read it. And then figure out how you could write a short program that would just be the seed for a solution. Then try to write that small program. And then, in a series of successive small step, you get closer and closer to the solution. I have shown at the bottom of the page my own progression, going from a very simple seed to a fool blown solution. The trick is to do add something fairly simple at every step.
- Problem
-
- Get first name, last name, Id from student, and final grade, as a number (0-100).
- Also known is class average, as a number (0-100).
- Display student information in a box, and horizontal bar graph of 2 grades.
- Example of Interaction with the User==
First name? Dominique
Last name? Thiebaut
Id? 990123456
Final grade? 90
+———————————————————————————————————-———————————-+
|Dominique Thiebaut 990123456 |
+———————————————————————————————————-———————————-+
00...10...20...30...40...50...60...70...80...90...100
grade: #############################################
class: ########################################
(The class average is set by the program, internally. The value used here in 80.)
Decomposition
Below are various steps showing how to progress through the writing of a solution program.
Step 1
# Exercise1.py
# D. Thiebaut
# 2/6/15
# This program prompts the user for some student information
# including name, Id, and final grade, and displays the result
# nicely formatted.
# Example of output:
#
#+———————————————————————————————————-———————————-+
#|Alex Andra 990123456 |
#+———————————————————————————————————————————-———-+
# 00...10...20...30...40...50...60...70...80...90...100
#grade: #########################
#class: #####################
#
# define constants
classAverage = 70
# get user data
fName = input( "First name? " )
lName = input( "Last name? " )
Id = input( "Id? " )
grade = eval( input( "Final grade? " ) )
# display result
print( fName, lName, Id )
print( grade )
print( classAverage )
Step 2
# define constants
classAverage = 70
# get user data
fName = "Alex" #input( "First name? " )
lName = "Andra" #input( "Last name? " )
Id = "990123456" #input( "Id? " )
grade = 80 #eval( input( "Final grade? " ) )
# display result
print( fName, lName, Id )
print( grade )
print( classAverage )
Step 3
# define constants
classAverage = 70
# get user data
fName = "Alex" #input( "First name? " )
lName = "Andra" #input( "Last name? " )
Id = "990123456" #input( "Id? " )
grade = 80 #eval( input( "Final grade? " ) )
# display result
print( "+———————————————————————————————————-———————————-+" )
print( fName, lName, Id )
print( "+———————————————————————————————————-———————————-+" )
print( " 00...10...20...30...40...50...60...70...80...90...100" )
print( grade )
print( classAverage )
Step 4
# define constants
classAverage = 70
# get user data
fName = "Alex" #input( "First name? " )
lName = "Andra" #input( "Last name? " )
Id = "990123456" #input( "Id? " )
grade = 80 #eval( input( "Final grade? " ) )
# create header
bar = "+———————————————————————————————————-———————————-+"
barLen = len( bar )
userLen = len( "|" + fName+ " " + lName + Id + " |" )
noSpaces = barLen - userLen
infoLine = "|" + fName + " " + lName + (" "*noSpaces) + Id + " |"
# display header
print( bar )
print( infoLine )
print( bar )
# display bar graph
print( " 00...10...20...30...40...50...60...70...80...90...100" )
print( grade )
print( classAverage )
Step 5
# define constants
classAverage = 100
# get user data
fName = "Alex" #input( "First name? " )
lName = "Andra" #input( "Last name? " )
Id = "990123456" #input( "Id? " )
grade = 80 #eval( input( "Final grade? " ) )
# create header
bar = "+———————————————————————————————————-———————————-+"
barLen = len( bar )
userLen = len( "|" + fName+ " " + lName + Id + " |" )
noSpaces = barLen - userLen
infoLine = "|" + fName + " " + lName + (" "*noSpaces) + Id + " |"
# create bar graph
padding = " "
scale = "00...10...20...30...40...50...60...70...80...90...100"
# create user bar
noHashTags = int( grade/2 )
studentBar = noHashTags * '#'
# create class bar
noHashTags = int( classAverage/2 )
classBar = noHashTags * '#'
# display header
print( bar )
print( infoLine )
print( bar )
# display bar graph
print( padding + scale )
print( "grade: " + studentBar )
print( "class: " + classBar )
We note that the scale is not quite accurate and needs to be "pushed" a bit to the right...
Step 6
# Exercise1.py
# D. Thiebaut
# 2/6/15
# This program prompts the user for some student information
# including name, Id, and final grade, and displays the result
# nicely formatted.
# Example of output:
#
#+———————————————————————————————————-———————————-+
#|Alex Andra 990123456 |
#+———————————————————————————————————————————-———-+
# 00...10...20...40...50...60...70...80...90...100
#grade: #######################################
#class: ##################################
#
# define constants
classAverage = 80
# get user data
fName = "Alex" #input( "First name? " )
lName = "Andra" #input( "Last name? " )
Id = "990123456" #input( "Id? " )
grade = 70 #eval( input( "Final grade? " ) )
# create header
bar = "+———————————————————————————————————-———————————-+"
barLen = len( bar )
userLen = len( "|" + fName+ " " + lName + Id + " |" )
noSpaces = barLen - userLen
infoLine = "|" + fName + " " + lName + (" "*noSpaces) + Id + " |"
# create bar graph
padding = " "
scale = "00...10...20...30...40...50...60...70...80...90...100"
# create user bar
noHashTags = int( grade/2 )
studentBar = noHashTags * '#'
# create class bar
noHashTags = int( classAverage/2 )
classBar = noHashTags * '#'
# display header
print( bar )
print( infoLine )
print( bar )
# display bar graph
print( padding + scale )
print( "grade: " + studentBar )
print( "class: " + classBar )
Step 7
# Exercise1.py
# D. Thiebaut
# 2/6/15
# This program prompts the user for some student information
# including name, Id, and final grade, and displays the result
# nicely formatted.
# Example of output:
#
#+———————————————————————————————————-———————————-+
#|Alex Andra 990123456 |
#+———————————————————————————————————————————-———-+
# 00...10...20...40...50...60...70...80...90...100
#grade: #######################################
#class: ##################################
#
# define constants
classAverage = 80
# get user data
fName = "Alex" #input( "First name? " )
lName = "Andra" #input( "Last name? " )
Id = "990123456" #input( "Id? " )
grade = 70 #eval( input( "Final grade? " ) )
# create header
bar = "+———————————————————————————————————-———————————-+"
barLen = len( bar )
userLen = len( "|" + fName+ " " + lName + Id + " |" )
noSpaces = barLen - userLen
infoLine = "|" + fName + " " + lName + (" "*noSpaces) + Id + " |"
# create bar graph
padding = " "
scale = "00...10...20...30...40...50...60...70...80...90...100"
# create user bar
noHashTags = int( grade/2 )
studentBar = noHashTags * '#'
# create class bar
noHashTags = int( classAverage/2 )
classBar = noHashTags * '#'
# display header
print( bar )
print( infoLine )
print( bar )
# display bar graph
print( padding + scale )
print( "grade: " + studentBar )
print( "class: " + classBar )
Step 8
Activate the input() statements, again.
# Exercise1.py
# D. Thiebaut
# 2/6/15
# This program prompts the user for some student information
# including name, Id, and final grade, and displays the result
# nicely formatted.
# Example of output:
#
#+———————————————————————————————————-———————————-+
#|Alex Andra 990123456 |
#+———————————————————————————————————————————-———-+
# 00...10...20...40...50...60...70...80...90...100
#grade: #######################################
#class: ##################################
#
# define constants
classAverage = 80
# get user data
fName = input( "First name? " )
lName = input( "Last name? " )
Id = input( "Id? " )
grade = eval( input( "Final grade? " ) )
# create header
bar = "+———————————————————————————————————-———————————-+"
barLen = len( bar )
userLen = len( "|" + fName+ " " + lName + Id + " |" )
noSpaces = barLen - userLen
infoLine = "|" + fName + " " + lName + (" "*noSpaces) + Id + " |"
# create bar graph
padding = " "
scale = "00...10...20...30...40...50...60...70...80...90...100"
# create user bar
noHashTags = int( grade/2 )
studentBar = noHashTags * '#'
# create class bar
noHashTags = int( classAverage/2 )
classBar = noHashTags * '#'
# display header
print( bar )
print( infoLine )
print( bar )
# display bar graph
print( padding + scale )
print( "grade: " + studentBar )
print( "class: " + classBar )
