Learn to Program with Small Basic

To keep the code simple, we didn’t add error-checking code. We also
assumed that the input file was properly formatted: each line contained a
user’s first and last names separated by a single space. Table 19-2 shows an
example input file for this program and the output file.
Table 19-2: Creating Login Names
User’s name
Tina Fey
Jimmy Fallon
David Letterman
Jay Leno
Amy Poehler
Login name
tfey
jfallo
dlette
jleno
apoehl
TRY IT OUT 19-2
Write a program that reads an input file and counts the number of lines, characters,
and spaces it contains.
File Management
In addition to the methods that let you perform file I/O, the File object
also provides a couple of methods related to file and directory management.
Using these methods, you can copy and delete files, create and delete
directories, and list files and directories from your program.
Copying and Deleting Files
You can use the CopyFile() method to create a copy of an existing file. This
method takes the pathnames of the source file and the destination file as
arguments. The source file isn’t affected by this operation. If the operation
is successful, the method returns "SUCCESS". Otherwise, it returns "FAILED".
If the destination path points to a location that doesn’t exist, the method
attempts to create it automatically. For example, look at the following code:
srcPath = "C:\Temp\Test1.txt"
' Path of the source file
dstPath = "C:\Temp\Temp1\Temp2\Test1.txt" ' Path of the destination file
File.CopyFile(srcPath, dstPath)
If the subfolders Temp, Temp1, and Temp2 don’t exist, CopyFile() attempts
to create all the directories in the destination path, beginning with the
root. When you run this code, you’ll have two copies of the Test1.txt file: the
original source file and the duplicate file under C:\Temp\Temp1\Temp2.
298 Chapter 19