Introduction Acme University has asked you to write a Visual Basic program which is supposed to…

Introduction Acme University has asked you to write a Visual Basic program which is supposed to generate a numerical score and a letter grade for students based on their answers for an test. Each question in the test is of True/False type. There are exactly 20 questions in the test. The student grade is calculated based on the answer key which will be provided to you as a text file.

Input Files:

1. There are three input files that your program needs to read and analyze. (Fields here are separated by commas.) The first file contains the answers for the 20 questions and is called Answer.txt. The format of this file is shown below:

TFTTTTTTFFTFTFTTTTFF

Each character is a solution for the test. The first character being the solution for question #1 and the last character the solution for question #20 respectively.

2. The second input file is called StudentResponses.txt. The format is outlined below:

5

236499,TFTFTFTFFFFTFTFFFTF

643828,TFTFTTTTTF–FTFTFTTF

917057,FTF-FTTTFFFTF-FTFTFT

656565,FTF-FTFTFTF-TTFT-TTT

183742,FFTF-FFT-TFFFTFTFTFF

The following details relate to StudentResponses.txt file:

? The data on the first line indicates the number of students who sat the test.

? Each line thereafter contains a 6 digit student’s id number followed by a comma and then the student’s responses to the test questions.

The first character in the Student’s Answers column refers to question #1 in the test the last character to question #20

? There could be dashes (-) between the T and F characters indicating that the student did not answer that question. In the above file, student with id# 643828 did not answer questions 11 and 12.

? Each correct response is worth 5 points, each incorrect response is worth -1 point and an unanswered question is worth 0 points. The maximum score attainable is 100 and the minimum 0. That is; even if a student gives an incorrect response to all 20 questions, his score will be 0, rather than -20. Your program should compare the student’s answers to the key provided and generate a total score for each student which needs to be stored. 3.

The third input file is called StudentDetails.txt. The format is outlined below:

10

643828,Mary,Low,Samoa

123456,Milo,Thatch,Fiji

917057,Filo,Fill,Tonga

656565,Mary,Runaway,Fiji

183742,Cat,Women,Vanuatu

236499,John,Noo,Fiji

129856,Ray,Sting,Solomons

258796,Shrek,Nice,Tuvalu

345871,Dan,Coyote,Vanuatu

414141,Ben,Foo,Samoa
The format of entries in the file is as outlined below: Number of students in class Student ID, FirstName, LastName, Country ?

The contents of this file may not match the order of the ID# in StudentResponses.txt file.

Output: You are then required to print in a label a grades result sheet which should contain a title, followed by the header identifying the columns – ID#, Name, Score and Grade attained. After that each line contains the student’s test results. Grade is calculated based on the following ‘grade_range’ table:

Score Range Grade <39 E

40 49 D

50 56 C

57 63 C+

64 70 B

71 77 B+

78 84 A

85 100 A+

Average class score, minimum and maximum scores also need to be calculated and printed on the label. For students who have missed the test, the grade will be Ex. Also the calculation of average does not include student who have missed the test.

Program Requirements/algorithm:

1. Create a MainMenu form. On this form implement the following functionality:

a) Put a button titled Open Answers File. When this button is clicked; open Answer.txt, and read and store the answers in an array of Strings. Close this file.

b) Put another button titled Open Student Responses File. When this button is clicked, do the following:

i. Open StudentResponses.txt file.

ii. Read the number of students who sat the test value and store it a variable.

iii. Then use a loop to read the student’s responses to the questions. This loop runs up to the number of students who sat the test value read in i). For each line read, split the record into ID# and responses and store in ID and Responses array or into an test Structure array that has an ID and responses field.

c) Put a third button titled Open Student Details File. When this button is clicked, do the following: a) Open and read StudentDetails.txt and store the data into appropriate arrays or into a StudentDetails structure array.

d) A forth button titled Display Grades Results when clicked, should open up another form titled Grades Results Sheet on which in a label should display the grades results for the class in accordance with the sample output given.

e) Finally put an Exit button to end the application.

2. On the Grades Results Sheet form, in addition to the label to contain the class results, have the following:

a) A button called Close Form that when clicked would close the Grades Results Sheet form and return to the MainMenu form”

b) In this form, consider creating the following procedures:

i. A function that calculates average score.

ii. Another function that determines the minimum score.

iii. And another to determine the maximum score.

c) When this forms loads, you should write code in the form Load even to produce the necessary grade results output in the label

Additional Notes:

? Make sure you include the statement Option Explicit On and Option Strict On at the start of your code file. This will ensure that all variables are declared before being used, helping to reduce errors.

? Also in steps 1 a), b) and c) use dialog boxes to retrieve the file paths.

? In all your program constructs you must write comments where necessary. Don’t write comments for obvious code, but segments of code which seem complex. Also include yours and your partners name, student id# respectively as comments at the top of your program code.

PLEASE DO IT ASAP and this to be done using Microsoft Visual Basic 2010 Express Edition.

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