PT1420 File Access And Visual Basic Lab Exam

Pt1420 File Access And Visual Basicpage 1this Lab Examines How To Wor

Pt1420 File Access And Visual Basic This lab examines how to work with a file by writing Visual Basic code. Read the following programming problem prior to completing the lab. Write and design a simple program that will take 3 pieces of data and write it to a file. Create variables and set them equal to the appropriate values: Declare string firstName = “xxx” Declare string lastName = “xxx” Declare integer age = your age Write this information to a file called myRecords.txt. Next, read this information from the file and print it to the screen.

Step 1: Create a new Visual Basic workspace and add the following code: Module Module1 Sub Main() Dim firstName As String = "XXXX" Dim lastName As String = "XXX" Dim age As Integer = #### Dim writer As System.IO.StreamWriter = System.IO.File.CreateText("myRecords.txt") writer.WriteLine(firstName & " " & lastName & " " & age) writer.Close() Dim reader As System.IO.StreamReader = System.IO.File.OpenText("myRecords.txt") Dim myInfo As String = reader.ReadLine() Console.WriteLine(myInfo) reader.Close() 'this causes a pause so you can see your program Console.Write("Press enter to continue...") Console.ReadLine() End Sub End Module Your module looks like this: PT1420: File Access and Visual Basic

Step 2: Change the values of the variables to your records.

Step 3: Run your program so that it works properly. Your output might look as follows: PT1420: File Access and Visual Basic

Step 4: Locate the .txt file in the bin\debug folder, and view your .txt file. Your output might look as follows: PT1420: File Access and Visual Basic

Step 5: Submit the Visual Basic code as a compressed (zipped) folder using the following steps: a. Open Windows Explorer --> Start --> All Programs --> Accessories --> Windows Explorer. Your Windows Explorer might look as follows: PT1420: File Access and Visual Basic b. In Windows Explorer, navigate to the folder that contains your project files. Your Windows Explorer might look as follows: (If you don't recall you can check in Visual Studio by opening your project, right click module1.vb file and view the properties. Look at the full path ex. C:\Users\instructor\Documents\Visual Studio 2010\Projects\myFirstProgram\myFirstProgram\Module1.vb; in this case navigate to C:\Users\instructor\Documents\Visual Studio 2010\Projects). Your module properties might look as follows: PT1420: File Access and Visual Basic c. Right click on your project folder and choose send to --> compressed folder. This creates a zip file of all your code. Your Windows Explorer might look as follows: d. Attach the compressed folder you created to your submission. Your Windows Explorer might look as follows: PT1420: Functions in Pseudocode and Visual Basic Writing Your Own Function that Returns an Integer Step 1: A function contains three parts: a header, a body, and a return statement.

The first is a function header that specifies the data type of the value that is to be returned, the name of the function, and any parameter variables used by the function to accept arguments. The body is composed of one or more statements that are executed when the function is called. In the following space, complete the following: (Reference: Chapter 6, Writing Your Own Functions, page 225 of your textbook, Starting Out with Programming Logic & Design ). 1. Write a function with the header named addTen. 1. The function will accept an Integer variable named number. 1. The function body will ask the user to enter a number and the add 10 to the number. The answer will be stored in the variable number.

1. The return statement will return the value of number. Function a. __________ a. ____________ ( b. ______________) Display “Enter a number:” Input c. _________________ Set c. _____________ = number + 10 Return d. ___________________ Step 2: In the following space, write a function call to your function from Step 1. Set number = ____________________ (__________________) Step 3: Launch and create a new workspace in Visual Basic. Place the following code inside and run the program. Notice there is already a call to addTen(number) and that the function call operates the same ways a module call does, except that a function call accepts a returned value. Therefore, the function call looks as number = addTen(number). Module Module1 Sub Main() Dim number As Integer = 0 number = addTen(number) Console.WriteLine("The number with 10 added to it is : " & number) Console.WriteLine("Press any key to continue...") Console.ReadLine() End Sub End Module Your module looks like this: Step 4: After End Sub in Main(), add a function by typing the following: Function addTen(ByVal number As Integer) When you hit enter, the End Function will automatically be added. All code in the function will be between Function and End Function.

Step 5: Write a line of code that will allow the user to enter a number and then add the formula number = number + 10 based on the pseudocode in step 1 of this lab. Step 6: Before End Function, add a return statement that looks like: Return number Now, your module looks like this: Step 7: Run your program so that if works properly. Your output might look as follow: Using Mathematical Library Function: sqrt Step 8: The sqrt function accepts an argument and returns the square root of the argument. In the following space, complete the following: (Reference: The sqrt Function, page 240 of your textbook, Starting Out with Programming Logic & Design ). 1. Declare a variable named myNumber and a variable named squareRoot of the data type Real. 1. Ask the user to enter a number of which they want to find the square root. Store the input in myNumber. 1. Call the sqrt function to determine the square root of myNumber. 1. Display the square root to the screen. Declare Real a. ___________________ Declare Real a. ______________________ Display “Enter a number:” Input b. _________________________ Set c. ______________ = _______________________ Display “The square root is”, d. ____________________ Step 9: Using the same Visual Basic workspace, under the output from your previous lab, declare and initialize myNumber and squareRoot as doubles set equal to 0. Step 10: Write a line of code that will allow the user to enter in a value for myNumber. Step 11: Next, add the following line of code which calls the System.Math.Sqrt() function: squareRoot = System.Math.Sqrt(myNumber) Also note the many other Math functions available for use. Step 12: Add a line of code that will display the value of squareRoot. Step 13: Run your program so that if works properly. Your output might look as follow: Step 14: Submit the Visual Basic code as a compressed (zipped) folder using the following steps: 1. Open Windows Explorer --> Start --> All Programs --> Accessories --> Windows Explorer. Your Windows Explorer might look as follows: 1. In Windows Explorer, navigate to the folder that contains your project files. Your Windows Explorer might look as follows: (If you don't recall you can check in Visual Studio by opening your project, right click module1.vb file and view the properties. Look at the full path ex. C:\Users\instructor\Documents\Visual Studio 2010\Projects\myFirstProgram\myFirstProgram\Module1.vb; in this case navigate to C:\Users\instructor\Documents\Visual Studio 2010\Projects). Your module properties might look as follows: 1. Right click on your project folder and choose send to --> compressed folder. This creates a zip file of all your code. Your Windows Explorer might look as follows: 1. Attach the compressed folder you created to your submission.

Paper For Above instruction

This assignment involves developing a Visual Basic program that demonstrates file operations and function creation. The core tasks include writing user data to a file, reading from it, and displaying the data, as well as creating and utilizing functions for mathematical operations such as adding a number and computing square roots. The process begins with creating a program that accepts personal information—first name, last name, and age—storing it in a text file named "myRecords.txt," then reading this data and printing it to the console. Subsequently, the program is expanded to include functions that modify and process user-input numbers, showcasing modular programming practices in Visual Basic.

The initial segment of the program focuses on file I/O operations. It involves declaring string variables for the first and last names and an integer variable for age. These variables are assigned appropriate values, then written to the file. Afterward, the program reads the content from "myRecords.txt" and displays the stored information. Doing so demonstrates fundamental file handling techniques in Visual Basic, such as creating, writing, reading, and closing file streams.

Following the file I/O example, the assignment emphasizes function creation, specifically a function called "addTen" that accepts an integer, prompts the user for a new number, adds ten to it, and returns the result. The function showcases passing parameters by value and returning computed results. The main program calls this function, updates the number variable with the returned value, and outputs the result.

Next, the project introduces mathematical library functions, illustrating how to compute a square root. It involves declaring variables of type Real and doubles, prompting the user for input, calling the math library's sqrt function or System.Math.Sqrt, and displaying the calculated square root. This segment emphasizes understanding built-in math functions, parameter passing, and output formatting.

Throughout the process, the instructions detail steps for development, testing, and submission, including navigating project directories, zipping the project folder, and attaching the compressed file for submission. These instructions aim to reinforce practical skills in managing Visual Basic projects, file handling, function creation, and mathematical computations, culminating in a comprehensive grasp of basic programming concepts.

References

• Starting Out with Programming Logic & Design, 4th Edition, Tony Gaddis, 2017.
• Microsoft Documentation on System.IO Namespace. (2023). Microsoft. https://docs.microsoft.com/en-us/dotnet/api/system.io
• Microsoft Documentation on Math Library Functions. (2023). Microsoft. https://docs.microsoft.com/en-us/dotnet/api/system.math
• Visual Basic Programming Language Reference. (2023). Microsoft. https://docs.microsoft.com/en-us/dotnet/visual-basic/
• Gaddis, T. (2014). Starting Out with Visual Basic. Pearson.
• Online Tutorials for Visual Basic File Handling. (2023). VB.NET Tutorials. https://vb.net-tutorials.com/files
• Code Sample Repository on GitHub. (2023). GitHub. https://github.com/examples/vbsharp
• Official Visual Studio Documentation. (2023). Microsoft. https://docs.microsoft.com/en-us/visualstudio/
• Best Practices for Modular Programming. (2022). Programming Journal. https://programmingjournal.com/modular-practices
• Understanding Built-in Math Functions in .NET. (2023). DotNET Guide. https://dotnet.guide/MathFunctions