More files

exercise17/exercise17.rb

+from_file, to_file = ARGV
+
+puts "Copying from #{from_file} to #{to_file}"
+
+# we could do these two on one line, how?
+in_file = open(from_file)
+indata = in_file.read
+
+puts "The input file is #{indata.length} bytes long"
+
+puts "Does the output file exist? #{File.exist?(to_file)}"
+puts "Ready, hit RETURN to continue, CTRL-C to abort."
+$stdin.gets
+
+out_file = open(to_file, 'w')
+out_file.write(indata)
+
+puts "Alright, all done."
+
+out_file.close
+in_file.close
\ No newline at end of file

exercise17/new_file.txt

+This a test file.

exercise17/test.txt

+This a test file.