Difference between revisions of "CSC111 Exercise with Class Inheritance"
Line 99: | Line 99: | ||
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+ | =Solution= | ||
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+ | The code below is the code we actually should add above, where the text in purple is located. | ||
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+ | <source lang="python"> | ||
+ | class PersonWorld( Person ): | ||
+ | def __init__( self, n, a, g, m, nat ): | ||
+ | super().__init__( n, a, g, m ) | ||
+ | self._nat = nat | ||
+ | |||
+ | def __str__( self ): | ||
+ | s = super().__str__() | ||
+ | return s +" "+self._nat | ||
+ | </source> | ||
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Latest revision as of 12:45, 18 April 2014
--D. Thiebaut (talk) 10:43, 18 April 2014 (EDT)
Exercise
- Transform the program below so that we can keep track of 2 kinds of people, person objects with just a name, age, gpa and major, and person objects with a name, an age, a gpa, a major and a country of origin.
# personInherited.py
# D. Thiebaut
# A program with a Person class in need of a derived class.
# Name the derive class PersonWorld
text = """
Alex, 20, 3.6, ART
Lulu, 21, 3.5, BIO
Alka, 19, 3.0, ENG
Le, 21, 3.2, EGR
"""
# ================================================================
# ____
#| _ \ ___ _ __ ___ ___ _ __
#| |_) / _ \ '__/ __|/ _ \| '_ \
#| __/ __/ | \__ \ (_) | | | |
#|_| \___|_| |___/\___/|_| |_|
#
class Person:
# a class containing 4 fields:
# - name of the person (string)
# - age (integer)
# - gpa (float)
# - major (string, uppercase)
# constructor: intializes a person with all fields
def __init__(self, n, a, g, m):
self._name = n
self._age = a
self._gpa = g
self._major= m
# returns a string with the name and age.
def __str__( self ):
return "%10s %d (%1.2f)--%s" % (
self._name, self._age, self._gpa, self._major )
# returns the name
def getName( self ):
return self._name
# set the age to a new value x
def setAge( self, x ):
self._age = x
# returns the age of the person
def getAge( self ):
return self._age
# gets the GPA
def getGPA( self ):
return self._gpa
# sets the GPA
def setGPA( self, g ):
self._gpa = g
... Add some code here...
def main():
p = Person( "Alex", 30, 3.99, "ARS" )
print( p )
p2 = PersonWorld( "Alka", 35, 3.75, "CSC", "India" )
print( p2 )
print( p2.getName(),"had a gpa of", p2.getGPA() )
main()
Solution
The code below is the code we actually should add above, where the text in purple is located.
class PersonWorld( Person ):
def __init__( self, n, a, g, m, nat ):
super().__init__( n, a, g, m )
self._nat = nat
def __str__( self ):
s = super().__str__()
return s +" "+self._nat