Question

Write VB.NET code to read a number from a file, use it to perform some calculations, and then

write the result to another file? The number in the input file is stored as a string and is separated
from other text on the same line by a space. The calculation you need to perform is to multiply
the number by 2.5, and the output file should contain the result as a floating-point number with
two decimal places.

Answer 1

To read a number from a file, perform calculations, and write the result to another file in VB.NET, you can use the File class and StreamReader/StreamWriter classes. Handle any exceptions that may occur during file operations.

Step-by-step explanation:

To read a number from a file, perform calculations, and write the result to another file in VB.NET, you can use the File class and StreamReader/StreamWriter classes. Here's an example:

Dim inputFile As String = "input.txt"
Dim outputFile As String = "output.txt"

Using reader As New StreamReader(inputFile)
Dim line As String = reader.ReadLine()
Dim number As Double = Convert.ToDouble(line.Split(" ")(0))
Dim result As Double = number * 2.5
Dim formattedResult As String = result.ToString("0.00")

Using writer As New StreamWriter(outputFile)
writer.Write(formattedResult)
End Using
End Using

This code reads the input file using a StreamReader, splits the line to extract the number, performs the calculation, formats the result with two decimal places, and then writes the result to the output file using a StreamWriter. Make sure to handle any exceptions that may occur during file operations.