Lab $3$ LetGetFit Software Development

Purpose:

Body Mass Index $($BMI$)$ is a measure of health based on height and weight. It can be calculated by taking your weight in kilograms and dividing it by the square of your height in meters. The interpretation of BMI for people $20$ years or older is as follows:

Note: one pound is $0\mathrm{.}45359237$ kilograms, and one inch is $0\mathrm{.}0254$ meters.

Suppose LetGetFit is a member$-$based fitness center that provides customized wellness plans to help members maintain the proper weight level. They use BMI as the main measurement to decide whether a customer needs to gain or lose weight. Their goal is to help customers maintain a BMI level between $18\mathrm{.}5$ and $25.$ LetGetFit has kept members' information on a paper$-$based file system. Recently, they decided to digitalize all the members' information and move to a computer$-$based system eventually. Below are LetGetFit$$s requirement for the system $($i$.$e$.,$ software$)$:

$$ Within the system, each member will have a digital profile containing the member's name, age, weight $($in pounds$),$ and height $($in inches$).$

$$ The administrator may need to update member's weight over time.

$$ To minimize the maintained workload, the ages should be automatically updated as the year

advances. E$.$g$.,$ if member A was $20$ years old in $2020,$ then A$\text{'}$s age should be automatically updated to $21$ in $2021.$

Task:

Design the prototype of this system mentioned above using Python. Each member profile can be an instance of a Member class.

You will need an instance method to update the member$$s weight and an instance method to access the member$$s age.

To update ages automatically, you might NOT want to keep the age for each member. Instead, you might keep the year$\_$of$\_$birth for each member. In such a way, when you need to get the age, you may simply use current$\_$year $-$ year$\_$of$\_$birth. You may use the datetime library to access the current year. Refer to the example below.

You will also need an instance method to calculate the BMI for the member.

After completing the Member class, you need to create a Test class to test your code. In the test class, you need to create the profiles of two members. You need to set the two profiles with proper test values $($i$.$e$.,$ name, age, weight, height$).$ After that, display the two members' information on your monitor. You want to form your string out as:

$$The BMI for $[$name$]($age$)$ is $[$BMI value$][$BMI Interpretation$]$

$$ Your output might look something like the one below $($possibly with different names, ages, BMIs,

and BMI interpretations$)$

Submission:

$$ Submit your Python scripts $($i$.$e$.,$ the $.$py file$)$ in Blackboard. Criteria:

$$ Comments describing the program:

$$ Properly defining the constructor for Member:

$$ Properly defining the methods for the age and weight:

$$ Properly defining the method to calculate the BMI:

$$ Properly implementing the test cases:

Due by Next Wednesday at Midnight

$5$ points $20$ points $20$ points $25$ points $30$ points