1. How to use filenum ...
For Alex Caracatsanis:
The correct code for this is instructive :
-- TESTED code ahead
include get.e
atom fn
sequence full_path, drive, file
puts(1, "enter drive letter: ")
drive = gets(0) -- get the drive letter in a sequence.
--It has a \n attached that will need to be stripped.
puts(1, "\nenter file name: ") -- start new line for better readability
file = gets(0) -- get the file name in a sequence
puts(1,"\n")
full_path = drive[1..length(drive)-1] & ":\\"
-- strip the \n and concatenate the ":\\" to the end of the drive
full_path = full_path & file[1..length(file)-1]
-- concatenate the file name to the drive letter and ":\\"
-- This could also be coded as full_path &= file[1..length(file)-1]
fn = open( full_path, "w" )
if fn = -1 then
-- file open error
else
-- do your stuff
close(fn)
-- End of code
For this type of code, it is critical to use concatenation (&) rather than
append.
An example:
sequence a,b,c,d
a={1,2,3,4} -- a four-element sequnce
b={5,6,7} -- a three-element seuqnce
c=a&b -- c is equal to {1,2,3,4,5,6,7} (a seven-element sequence)
d=append(a,b) -- d is equal to {1,2,3,4,{5,6,7}}
-- (a five-element sequence with a subsequence)
-- Mike Nelson
