Day 4: Class vs. Instance

• Instructions:
  • Use the constructor to verify the parameter initialAge
    • If initialAge is negative, print Age is not valid, setting age to 0. and set the instance variable age to 0
  • Complete the amIOld method
    • if age < 13 print You are young.
    • if 13 <= age < 18 print You are a teenager.
    • otherwise print You are old.
  • Complete the yearPasses method by incrementing the age instance variable by 1
  • Contraints:
    • 1 <= t <= 4
    • 5 <= age <= 30

Excercise

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class Person:
    def __init__(self,initialAge):
        # Add some more code to run some checks on initialAge

    def amIOld(self):
        # Do some computations in here and print out the correct statement to the console

    def yearPasses(self):
        # Increment the age of the person in here

t = int(input())

for i in range(0, t):
    age = int(input())         
    p = Person(age)  
    p.amIOld()
    for j in range(0, 3):
        p.yearPasses()       
    p.amIOld()
    print("")

Solution

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#!/bin/python3

class Person:
    def __init__(self,initialAge):
        # Add some more code to run some checks on initialAge
        if initialAge < 0:
            print("Age is not valid, setting age to 0.")
            self.age = 0
        else:
            self.age = initialAge

    def amIOld(self):
        # Do some computations in here and print out the correct statement to the console
        if self.age < 13:
            print("You are young.")
        elif 13 <= self.age < 18:
            print("You are a teenager.")
        else:
            print("You are old.")

    def yearPasses(self):
        # Increment the age of the person in here
        self.age+=1
        
t = int(input())

for i in range(0, t):
    age = int(input())         
    p = Person(age)  
    p.amIOld()
    for j in range(0, 3):
        p.yearPasses()       
    p.amIOld()
    print("")