Make a backup file: Difference between revisions
Added FreeBASIC
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close-file throw ;
s" testfile" backup</syntaxhighlight>
</syntaxhighlight>▼
=={{header|FreeBASIC}}==
<syntaxhighlight lang="vbnet">Sub saveWithBackup(filePath As String, lines() As String)
Dim As String origPath = filePath
If Len(Dir(origPath)) > 0 Then
Dim As String backupPath = origPath & ".backup"
Name(origPath, backupPath) 'Renames a file on disk
End If
Open origPath For Output As #1
For i As Integer = 1 To Ubound(lines)
Print #1, lines(i)
Next i
Close #1
End Sub
Dim lines(1 To 3) As String => {"fourth", "fifth", "sixth"}
saveWithBackup("original.txt", lines())
Dim As String linea
' check it worked
Print "Current contents of original.txt:"
Open "original.txt" For Input As #1
While Not Eof(1)
Line Input #1, linea
Print linea
Wend
Close #1
Print !"\nContents of original.txt.backup:"
Open "original.txt.backup" For Input As #1
While Not Eof(1)
Line Input #1, linea
Print linea
Wend
Close #1
▲Sleep</syntaxhighlight>
{{out}}
Contents of 'original.txt' ''before'' the program is run and of 'original.txt.backup' ''after'' it is run:
<pre>
first
second
third
</pre>
Contents of 'original.txt' ''after'' the program is run:
<pre>
fourth
fifth
sixth
</pre>
=={{header|Go}}==
===Rename===
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