Question

Question 1. (50 points) 1.Write a program that computes information related to a sequence of entries regarding age of customers. The user is asked to enter the age of each customer until they wish to stop. The program then computes and displays the following:2. The number of customers in total and in each age group3. The average age for all customers.4. The youngest and oldest customer.4. The range of age (range = highest– lowest). 5. The average age for each age catego

Answer 1

Answer:

The solution code is written in Python 3:

1. count = 0
2. totalAge = 0
3. group1_count = 0    #age < 10
4. group2_count = 0    #age 10 - 20
5. group3_count = 0    #age 20 - 40
6. group4_count = 0    #age > 40
7. group1_total = 0    #subtotal age <= 10
8. group2_total = 0    #subtotal age 11 - 20  
9. group3_total = 0    #subtotal age 21 - 40  
10. group4_total = 0    #subtotal age > 40
12. age = int(input("Input an age: "))
13. youngest = age
14. oldest = age
16. while(age != -1):
17.    count += 1
18.    totalAge += age
19.    
20.    if(age <= 10):
21.        group1_count += 1
22.        group1_total += age
23.    elif(age <= 20):
24.        group2_count += 1
25.        group2_total += age
26.    elif(age <= 40):
27.        group3_count += 1
28.        group3_total += age
29.    else:
30.        group4_count += 1
31.        group4_total += age
33.    if(youngest > age):
34.        youngest = age  
35.    
36.    if(oldest < age):
37.        oldest = age  
39.    age = int(input("Input an age: "))
41.    
42. totalCustomer = count  
43. avgAge = totalAge / count  
44. rangeAge = oldest - youngest  
45. avgAgeGroup1 = group1_total / group1_count  
46. avgAgeGroup2 = group2_total / group2_count  
47. avgAgeGroup3 = group3_total / group3_count  
48. avgAgeGroup4 = group4_total / group4_count  
50. print("The total number of customers: " + str(totalCustomer))
51. print("Total number of customer in Group 1 (<=10): " + str(group1_count))
52. print("Total number of customer in Group 2 (11 - 20): " + str(group2_count))
53. print("Total number of customer in Group 3 (21 - 40): " + str(group3_count))
54. print("Total number of customer in Group 4 (> 40): " + str(group4_count))
55. print("Average age for all customer: " + str(avgAge))
56. print("Youngest age: " + str(youngest))
57. print("Oldest age: " + str(oldest))
58. print("The range of age: " + str(rangeAge))
59. print("Average age for group 1 (<=10): " + str(avgAgeGroup1))
60. print("Average age for group 2 (11 - 20): " + str(avgAgeGroup2))
61. print("Average age for group 3 (21 - 40): " + str(avgAgeGroup3))
62. print("Average age for group 4 (> 40): " + str(avgAgeGroup4))

Explanation:

Firstly, create the counter variables (e.g. count, group1_count, group2_count etc ) to track the total number of customer and number in each age group. Besides, create variables to hold the value of total of age and sub-total of each age group (Line 1 - 10). We presume there are only four age groups.

Next, prompt user to input the first age (Line 12)

Create variable youngest and oldest to track the lowest and highest age (Line 13 -14). At the moment, set the first input age as value of youngest and oldest.

Create a while loop with sentinel value  -1 (Line 16). Within the loop, track the customer occurrence by incrementing counter variables by one (Line 17, 21, 24, 27 & 30). At the same time, add the current input age to totalAge and to group total (Line 18, 22, 25, 28, & 31).

If the current youngest value is bigger than the current input age, we set the current age to youngest (Line 33- 34).

If the current oldest value is smaller than the current input age, we set the current age to oldest (Line 36- 37).

After terminating the loop with -1, calculate the average age for all customers and for each age group and the range of age (Line 42- 48)  

At last, display all the required calculation results using print function (50 - 62)