Question

Problem #2: Going to the Fair Assignment Goals: understanding problem requirements, logical thinking, if-elif-else, and logical operators.
Suppose the Great Frederick Fair wants to update its ticketing software. They need you to write a program to handle the price calculations, using the rules*:
• The basic price of a ticket is $40. • Senior citizens (age >= 65) get a 50% discount. • Children under 6 are free. • For residents of Frederick County, the basic price is $35; the same discounts still apply.
So the possible ticket prices are $0, $17.50, $20, $35, and $40.   
Your program should request age and county name from the user. The age will be entered as an integer and the county name as a string.
Before calculating the price, confirm that the user's age is valid – not negative and not more than 110. If it is not, give a message and do not do the calculation. Also, the county name should not be case sensitive – for example, Frederick, frederick, and FREDERICK should all be acceptable.
Test your program with a variety of ages and counties to be sure you have considered all the conditions. Here are some samples to use.
Test run # County Age 1 Frederick 12 2 Frederick 72 3 Carroll 2 4 Howard 65 5 Washington 0 6 Frederick 5 7 Montgomery 6 8 Carroll 35 9 Frederick -15 10 Frederick 44 11 Howard 112 12 Cecil 13

Your program should be written with the future in mind. The Great Frederick Fair might need to raise the basic prices or modify the discounts in the future. (Hint: named constants, not hard-coded literals!)   
*These aren’t the real prices. The real system is much more complicated. My favorite among the real ones is the Carload Special Tuesday - $60 for everyone legally buckled in a vehicle, buses NOT included.

Answer 1

Screenshot

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Program

#Constants
BASE_PRICE=40
FREDERICK_PRICE=35
SENIOR_RATEPERCENTAGE=50
FREE_AGE=6
SENIOR_AGE=65
#Function to get the ticket rate
#Take age and country names as arguments
#return ticket rate
def calculateRate(age,county):
    if(age<0 or age>110):
        print('Invalid age!!!')
    elif(age<FREE_AGE):
        return 0
    elif(age>=SENIOR_AGE and county.upper()=='FREDERICK'):
        return FREDERICK_PRICE*(SENIOR_RATEPERCENTAGE/100)
    elif(age>=SENIOR_AGE):
        return BASE_PRICE*(SENIOR_RATEPERCENTAGE/100)
    elif(county.upper()=='FREDERICK'):
        return FREDERICK_PRICE
    else:
        return BASE_PRICE
#Test cases
test1=calculateRate(12,'Frederick')
if(test1!=None):
    print('Test1 ticket rate is $',test1)
test2=calculateRate(72,'Frederick')
if(test2!=None):
    print('Test2 ticket rate is $',test2)
test3=calculateRate(2,'Carroll')
if(test3!=None):
    print('Test3 ticket rate is $',test3)
test4=calculateRate(65,'Howard')
if(test4!=None):
    print('Test4 ticket rate is $',test4)
test5=calculateRate(0,'Washington')
if(test5!=None):
    print('Test5 ticket rate is $',test5)
test6=calculateRate(5,'Frederick')
if(test6!=None):
    print('Test6 ticket rate is $',test6)
test7=calculateRate(6,'Montgomery')
if(test7!=None):
    print('Test7 ticket rate is $',test7)
test8=calculateRate(35,'Carroll')
if(test8!=None):
    print('Test8 ticket rate is $',test8)
test9=calculateRate(-15,'Frederick')
if(test9!=None):
    print('Test9 ticket rate is $',test9)
test10=calculateRate(44,'Frederick')
if(test10!=None):
    print('Test10 ticket rate is $',test10)
test11=calculateRate(112,'Howard')
if(test11!=None):
    print('Test11 ticket rate is $',test11)
test12=calculateRate(13,'Cecil')
if(test12!=None):
    print('Test12 ticket rate is $',test12)

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Output

Test1 ticket rate is $ 35
Test2 ticket rate is $ 17.5
Test3 ticket rate is $ 0
Test4 ticket rate is $ 20.0
Test5 ticket rate is $ 0
Test6 ticket rate is $ 0
Test7 ticket rate is $ 40
Test8 ticket rate is $ 40
Invalid age!!!
Test10 ticket rate is $ 35
Invalid age!!!
Test12 ticket rate is $ 40