file for ex16

ex16.rb

@@ -0,0 +1,33 @@
+filename = ARGV.first
+script = $0
+
+puts "We're going to erase #{filename}."
+puts "If you don't want that, hit CTRL-C (^C)."
+puts "If you do want that, hit RETURN."
+
+print "? "
+STDIN.gets
+
+puts "Opening the file..."
+target = File.open(filename, 'w')
+
+puts "Truncating the file.  Goodbye!"
+target.truncate(target.size)
+
+puts "Now I'm going to ask you for three lines"
+
+print "line 1: "; line1 = STDIN.gets.chomp()
+print "line 2: "; line2 = STDIN.gets.chomp()
+print "line 3: "; line3 = STDIN.gets.chomp()
+
+puts "I'm going to write these to the file."
+
+target.write(line1)
+target.write("\n")
+target.write(line2)
+target.write("\n")
+target.write(line3)
+target.write("\n")
+
+puts "And finally, we close it."
+target.close()