Objectives To practice and learn the following coding skills: Declare memory locations for data (defining variables) Use predefined data types (int, float, double, decimal...) efficiently (proper...

Objectives

To practice and learn the following coding skills:

• Declare memory locations for data (defining variables)


• Use predefined data types (int, float, double, decimal...) efficiently (proper memory size and type)


• Declare and manipulate strings


• Work with constants


• Write expressions using arithmetic operators


• Learn special formatting rules for numbers (integral and floating point) and percentage


• Naming Convention for constants (ALL_CAPS) and variables (camelCase)


• Instructions


• Write a program that computes a weighted average (read endnote about weighted average )1 of final grades of students in 1175, giving the following weights:




• Assignments: 20%


• Midterm exam: 30%


• Quizzes: 20%




• Final Exam: 30%


• Do a compile-time initialization (initialize variables and constants in your source code. It means, the user of your program will not type in the input values, instead you as a programmer set initial values to the variables).




• You are provided with the following screenshots of several test executions of the program. You can test your program with values that you can see in the screenshots.

Requirements

1. On very top of your program, before using directives, write a multiline comment and write the followings:


2. Programmer: (your name)


3. Date: (Fall 2020)


4. Purpose: (explain the purpose of the program)


5. Inside the Main() Method, start declaring all constants and variables. Define 4 constants for the percentages of 4 components of the course. Define one percentage for quizzes (20%) and not two percentages for quiz1 (10%) and quiz2 (10%). That is, one constant for quizzes percentage and not two constants for quiz1 percentage and quiz2 percentage separately.


6. Respect naming convention for constants. (Hint: There are 3 naming conventions: PascalCase, camelCase, ALL_CAPS. Which naming convention is used for constants? Which one is used for variables?)


7. Choose float as the data type for percentages, because percentages are not big numbers.


8. Initialize values for percentages. For example: const float ASSIGNMENTS_PERCENTAGE = 0.2f; (f is for enforcing the


9. data type to float, otherwise the data type is double by default. Remove f after 0.2 to see what happens)


10. Define variables to store grades of a student for each assessment (assignment, midterm exam, quiz1...) and initializes them with some values out of 100. Choose the most efficient data type for these variables (efficient in terms of size and type (integral or


11. floating point)). Should the type of variable be float? Should be int? long? Choose the most efficient one!


12. Use Write() in your program to display on console a box exactly as you can see on the screenshots. Pay attention to the backslash signs at the beginning and ends of every line and double quotation marks around Total Weighted Average Calculator. Use only Console.Write() to show this box. DO NOT USE WriteLine(). To display this whole box, use only Write() and escape characters (\t ,


13. \n, \”, \\) to display spaces, new lines, quotations, and backslashes. Use \t instead of many spaces!


14. To display the table as you can see on the screenshots, you must use WriteLine() and Format Specifiers (read textbook, pages 110 to 115 or lecture slides chapter2 - #66 onward). For example, to display the row for assignments use a statement like the following:


15. WriteLine("{0,14}{1,13:P0} {2,-15}", "Assignments", ASSIGNMENTS_PERCENTAGE, assignments);

Explanation:

• {0,14} means the first parameter (the string “Assignments”), reserves 14-character column and it would be right aligned.


• {1,13:P0} means the second parameter (the constant ASSIGNMENTS_PERCENTAGE), reserves 13-character column, and


• it would be right aligned and displays the value of the parameter (ASSIGNMENTS_PERCENTAGE) as percentage with 0


• digits on the fraction part of the number. The percentage sign (%) is automatically added to numbers.


• {2,-15} means the third parameter (the value of assignments variable) is displayed in a 15-character reserved column,


• and left aligned (negative means left-aligned).

9. Make sure to test your program with the 5 sets of numbers as you can see on 5 screenshots included in this document and your

program must display the same results. To test your code with 5 sets of values (or inputs), you must have 5 copies of all variables in your code with different values. Every time you want to test your program with one set of variables, comment the other 4 sets of varibles and uncomment only one set of variables. This way, only that set of variables are used in your program calculation and the results on console is based on that set of variables. When your program works perfectly based on that set of variables, comment this set and uncomment another set of variables. Repeat this until you test your program with all 5 sets of variables.

10. IMPORTANT:Everytimethatyourunyourprogramtotest,yourprogrammusttaketheinitialvaluesforvariablesassignments, midtermExam, quiz1, quiz2, finalExam. Your program must calculate and show the Total Weighted Average and WAT-on-Exams automatically based on the values of those variables. Do not calculate them manually yourself and use Write() method to display on console the numbers you have calculated. This assignment is to exercise writing a program that does calculation and not just using Write() and WriteLine() to display some strings!

1. Makesureyourcodelooksneatandtidy.PressCtrl+KDinVisualStudiotoformatyourcodebasedoncodingstyles.


2. Payattentionthattheresultsofcalculationshaveonly2decimalpoints,thatis,83.70or42.50andnot83.71234or42.54567.


3. Respect Naming Conventions for constants (ALL_CAPITALS) and variables (camelCase).

I have included the executable file of my program in the assignment zip file. It helps you to better understand what you must produce. This executable only displays the result of one of the above screenshots. Please note you cannot change the executable to display other screenshots as you do not have access to the source code of the program.

Checklist Before Submission

• All variables and consts are defined together on top of the methods (in this assignment, Main method)


• Consts have been used in the calculation of weightedExams and totalWeightedAverageand


• Your program works correctly, and the results are identical to numbers in 5 screenshots provided to you


• Submission


• Please submit the following items to the corresponding assignment folder on BlackBoard prior to the deadline:

• A zip/archive the whole folder containing the project folder specially source code files (.cs file). Rename the zip file name as a#_xy.zip where # is assignment number, x is your first name and y is your last name. For example, when I submit my work for assignment 2, I would rename the zip file as a2_zni.zip

Marking Guideline

The program works correctly with all 5 sets of values 25 Proper variables defined and used properly 8 Consts defined and used in calculations 7 Correct totalWeightedAverage Expression is written 15 Using Escape characters to display Banner properly 15 Displaying the table properly using formatting rules 15 Proper naming convention for variables(camelCase) and consts (ALL_CAPS) 15

Total 100 0

1 a weighted average is different from a simple average.

For a Simple Average, you add up all the values, then divide by the total number of values.

Weighted Average is when values take different importance (weight), so you multiply by their weight (importance) then sum it all up, then divide by the total weight.

I explain it here: assume there are 3 values and 3 weights for them, the weighted average is calculated as

weightedAverage = (value1 * weight1 + value2 * weight2 + value3 * weight3) / (weight1 + weight2+weight3);

whereas, a simple average is calculated as

average = (value1 + value2 + value3 ) / 3;

as you can see for simple average, no weight is considered. In fact, all values have the same weight. for example, if values are (32,45,65) and weights are (20%, 35% and 45%) then

weightedAverage = (32 * 20 + 45 * 35 + 65 * 45) / (20 + 35 + 45) = (32 * 20 + 45 * 35 + 65 * 45) / (100) = 51.40;

or you can write equally your formula as:

weightedAverage = (32 * 0.20 + 45 * 0.35 + 65 * 0.45) / (0.20 + 0.35 + 0.45) = (32 * 0.20 + 45 * 0.35 + 65 * 0.45) / (1) = 51.40;

while the simple average of (32, 45, 65) is:

average = (32 + 45 + 65) / 3 = 142 / 3 = 47.33

as you can see simple average of (32, 45, 65) is 47.33 whereas weighted average of them with weights (20%, 35% and 45%) respectively is 51.45 and they are not the same.

Pay attention that in this assignment you have to calculate two weighted averages, one that includes all components of the course and one that excludes assignments from the calculation, so the second average is calculated out of 80% (not 100%) because the weight of assignments is 20% that is excluded, so the formula is:

weightedExams = (midtermExam * MIDTERM_EXAM_PERCENTAGE + (quiz1 + quiz2) * QUIZZES_PERCENTAGE / 2 + finalExam * FINAL_EXAM_PERCENTAGE) / 0.8f ;

Task

Points

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