Implement A Program That Permits Selecting Graded Assignment

Implement a program that permits selecting graded assignments,Calculates grades, writing and reading from file

During the quarter, CS105 students want to know their current grades based on submitted assignments and exams. Create a program that allows users to select which assignments and exams they have completed, input their scores, and then calculate their overall grade both as a percentage and letter grade. The program should then write this information to a file and notify the user via a message box that the data has been saved. Additionally, provide functionality for users to read and display the contents of the file. Use CheckBoxes for selection, and implement functions to compute the numerical grade and convert it to a letter grade. The interface should include controls to input scores, buttons to calculate, write to file, and read from file, and a multiline read-only textbox to display file contents. Use form object properties such as Visible to manage interface flow, and format percentage output properly. Ensure to include the weighted contribution of each assignment/exam as per the syllabus and use the provided grading scale for conversion to letter grades.

Sample Paper For Above instruction

In the context of academic performance evaluation, it is essential to develop a comprehensive software tool that can aggregate students' submitted assignments and examinations, compute their current grade, and present this information in an accessible format. This project involves designing a Windows Forms application in Visual Basic that leverages important programming concepts such as functions, scope, file I/O, and user interface controls like CheckBoxes and MessageBoxes.

Firstly, the application must present a user interface that contains CheckBoxes representing various assignments and exams. These CheckBoxes enable the user to select which graded components they have completed. Corresponding TextBoxes are used for entering the scores received for each selected item. To ensure clarity, the TextBoxes should initially have their Text property set to zero. As scores are entered, the application will calculate the total grade based on predefined weights for each assignment and exam, consistent with the syllabus.

To accurately compute the overall percentage, the program should implement a function procedure, say, CalculateNumericalGrade(), which sums up the weighted scores of all selected components and returns the final percentage as a Double. This function accesses class-level variables or constants that hold the weights for each graded component. The percentage value can then be formatted using String.Format with the "{0:P}" format specifier to display it with a percent sign, for example, "94.54%".

Next, the program must convert the percentage grade into a letter grade according to the provided grading scale. This conversion should be encapsulated within a function, ConvertToLetterGrade(), which takes the numerical percentage as input and returns the appropriate letter grade string. The formatted grade and letter grade are then presented to the user in designated Label or TextBox controls.

After calculating the grade, the application should write all relevant information to a text file. This involves opening the file in write mode, outputting the selected assignment names, scores, the numerical grade, and the letter grade, and then closing the file. Upon successful write operation, a MessageBox should notify the user that the grade has been saved. The application should be designed such that the "Write to File" button only becomes visible after a successful calculation.

Furthermore, users must have the ability to read the saved information back from the file and display it in a multiline, read-only TextBox with scroll bars enabled. When the "Read from File" button is clicked, the contents of the file are loaded and displayed, and the interface elements related to writing and reading are appropriately hidden or disabled to prevent redundant operations.

In terms of implementation detail, the program should leverage the Visible property of controls to guide user interaction, hide the "Write to File" and "Read from File" buttons once their functions are completed, and ensure proper error handling for file operations. The design should be modular, with clear separation of user interface handling and logical processing encapsulated within the stated functions. Attention should be given to maintain code readability, proper scope declaration for variables, and adherence to programming best practices in VB.NET.

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