gistfile1.rb

# read_write.rb
# reads from input file 
# writes to output file
# printing line nums

counter = 1
outFile = File.new("output.txt", "w")
inFile = File.new("input.txt", "r")
  while (line = inFile.gets)
    outFile.puts "#{counter}: #{line}"
    counter = counter + 1
  End
inFile.close
outFile.close