I am trying to write a small little program that will currently run in
a command window (I will convert it later to GUI).
How do I request input from the user such as:
Please enter dollar amount:
I would like the prompt to display and the user to be able to enter the
data after the prompt. I thought "gets" would do it but I don't
understand how to get the prompt to display.
Thanks
Len Sumnler
Citát len <lsumnler@gmail.com>:
I am trying to write a small little program that will currently run in
a command window (I will convert it later to GUI).How do I request input from the user such as:
>>Please enter dollar amount:
I would like the prompt to display and the user to be able to enter the
data after the prompt. I thought "gets" would do it but I don't
understand how to get the prompt to display.Thanks
Len Sumnler
Well, this isn't BASIC, gets isn't supposed to display a prompt. Go like this:
puts ">>>Please enter dollar amount:"
amount = gets
David Vallner
len wrote:
How do I request input from the user such as:
>>Please enter dollar amount:
I would like the prompt to display and the user to be able to enter the
data after the prompt. I thought "gets" would do it but I don't
understand how to get the prompt to display.
STDOUT.sync=true
print '>> Please enter amount: $'
resp = STDIN.gets.chomp
puts resp # echo input
puts "\nYour acount balance is below $" << resp << " :-?"
#-> Please enter amount: $12
#->
#-> Your acount balance is below $12 :-?
daz
len wrote:
I am trying to write a small little program that will currently run in
a command window (I will convert it later to GUI).How do I request input from the user such as:
>>Please enter dollar amount:
I would like the prompt to display and the user to be able to enter the
data after the prompt. I thought "gets" would do it but I don't
understand how to get the prompt to display.Thanks
Len Sumnler
Thanks everyone for your responses. At this time, and with my level of
experience (none), I think the option I am looking for is the "puts"
command.
Again thanks everyone for your responses I have copied all of them for
future reference.
Len Sumnler
Hi --
On Fri, 12 Aug 2005 david@vallner.net wrote:
Citát len <lsumnler@gmail.com>:
I am trying to write a small little program that will currently run in
a command window (I will convert it later to GUI).How do I request input from the user such as:
Please enter dollar amount:
I would like the prompt to display and the user to be able to enter the
data after the prompt. I thought "gets" would do it but I don't
understand how to get the prompt to display.Thanks
Len SumnlerWell, this isn't BASIC, gets isn't supposed to display a prompt. Go like this:
puts ">>>Please enter dollar amount:"
amount = gets
Or use print instead of puts, if you want the input on the same line
as the prompt.
David
--
David A. Black
dblack@wobblini.net
Or use the readline library, there you can even supply the prompt and
you get a ton of extras.
regards,
Brian
On 12/08/05, daz <dooby@d10.karoo.co.uk> wrote:
len wrote:
>
> How do I request input from the user such as:
>
> >>Please enter dollar amount:
>
> I would like the prompt to display and the user to be able to enter the
> data after the prompt. I thought "gets" would do it but I don't
> understand how to get the prompt to display.
>STDOUT.sync=true
print '>> Please enter amount: $'
resp = STDIN.gets.chomp
puts resp # echo input
puts "\nYour acount balance is below $" << resp << " :-?"#-> Please enter amount: $12
#->
#-> Your acount balance is below $12 :-?daz
--
http://ruby.brian-schroeder.de/
Stringed instrument chords: http://chordlist.brian-schroeder.de/
STDOUT.sync = true isn't necessary in that snippet. Even though you
haven't output a newline, the outbuffer will get flushed as soon as
you call gets.
Bill
On 8/12/05, daz <dooby@d10.karoo.co.uk> wrote:
len wrote:
>
> How do I request input from the user such as:
>
> >>Please enter dollar amount:
>
> I would like the prompt to display and the user to be able to enter the
> data after the prompt. I thought "gets" would do it but I don't
> understand how to get the prompt to display.
>STDOUT.sync=true
print '>> Please enter amount: $'
resp = STDIN.gets.chomp
puts resp # echo input
puts "\nYour acount balance is below $" << resp << " :-?"#-> Please enter amount: $12
#->
#-> Your acount balance is below $12 :-?daz
--
Bill Atkins
You'd probably want
puts "Please enter dollar amount":
gets line
Julian.
On 13/08/2005, at 12:41 AM, len wrote:
len wrote:
I am trying to write a small little program that will currently run in
a command window (I will convert it later to GUI).How do I request input from the user such as:
Please enter dollar amount:
I would like the prompt to display and the user to be able to enter the
data after the prompt. I thought "gets" would do it but I don't
understand how to get the prompt to display.Thanks
Len SumnlerThanks everyone for your responses. At this time, and with my level of
experience (none), I think the option I am looking for is the "puts"
command.Again thanks everyone for your responses I have copied all of them for
future reference.Len Sumnler
How do I request input from the user such as:
Please enter dollar amount:
I would like the prompt to display and the user to be able to enter the
data after the prompt. I thought "gets" would do it but I don't
understand how to get the prompt to display.]
Do this first:
$ sudo gem install highline
Then you can get nice prompts like this:
#!/usr/local/bin/ruby
require "rubygems"
require "highline/import"
dollar_amt = ask("Please enter the dollar amount : ")
Then you can just use dollar_amt however you want and when you rub your program it will prompt for the input and once it gets it it will assign it to dollar_amt. Nice and simple. Thanks to James and Greg.
HTH-
-Ezra Zygmuntowicz
Yakima Herald-Republic
WebMaster
509-577-7732
ezra@yakima-herald.com
Bill Atkins wrote:
STDOUT.sync = true isn't necessary in that snippet. Even though you
haven't output a newline, the outbuffer will get flushed as soon as
you call gets.
That's not a feature of Ruby 1.8.2
You may be describing *nix behaviour ?
On Windows, it looks as if the program is hanging unless #sync of #flush
is used.
[What's worrying is that I can't manage to spell acccount]
daz
Hi --
You'd probably want
puts "Please enter dollar amount":
gets line
I doubt it, unless you've got some reason to expect the input to
terminate with whatever line contains 
David
On Fri, 12 Aug 2005, Julian Leviston wrote:
Julian.
On 13/08/2005, at 12:41 AM, len wrote:
len wrote:
I am trying to write a small little program that will currently run in
a command window (I will convert it later to GUI).How do I request input from the user such as:
Please enter dollar amount:
I would like the prompt to display and the user to be able to enter the
data after the prompt. I thought "gets" would do it but I don't
understand how to get the prompt to display.Thanks
Len SumnlerThanks everyone for your responses. At this time, and with my level of
experience (none), I think the option I am looking for is the "puts"
command.Again thanks everyone for your responses I have copied all of them for
future reference.Len Sumnler
--
David A. Black
dblack@wobblini.net
a minor correction:
On 12/08/05, Julian Leviston <julian@coretech.net.au> wrote:
You'd probably want
- puts "Please enter dollar amount":
+ puts "Please enter dollar amount:"
gets line
regards,
Brian
--
http://ruby.brian-schroeder.de/
Stringed instrument chords: http://chordlist.brian-schroeder.de/
Or you could use Rio (http://rio.rubyforge.org)
amt = rio(?-).print("Please enter dollar amount: ").chomp.gets
That's strange - it doesn't hang on Windows for me.
On 8/12/05, daz <dooby@d10.karoo.co.uk> wrote:
Bill Atkins wrote:
> STDOUT.sync = true isn't necessary in that snippet. Even though you
> haven't output a newline, the outbuffer will get flushed as soon as
> you call gets.That's not a feature of Ruby 1.8.2
You may be describing *nix behaviour ?On Windows, it looks as if the program is hanging unless #sync of #flush
is used.[What's worrying is that I can't manage to spell acccount]
daz
--
Bill Atkins
Hi --
On Sat, 13 Aug 2005, [ISO-8859-1] Brian Schröder wrote:
a minor correction:
On 12/08/05, Julian Leviston <julian@coretech.net.au> wrote:
You'd probably want
- puts "Please enter dollar amount":
+ puts "Please enter dollar amount:"
gets line
I'm almost certain he actually wants:
line = gets
David
--
David A. Black
dblack@wobblini.net
Thank you all.
Right now I just a newbie trying to write some simple programs to get
the hang of the language. For now
puts 'Please enter the bill amount'
amount = gets
will do nicely. One must learn to walk before you can run and jumping
tall building in a single bound.................maybe 18 months away:)
Len Sumnler
Quite true, blush 
brian
On 12/08/05, David A. Black <dblack@wobblini.net> wrote:
Hi --
On Sat, 13 Aug 2005, [ISO-8859-1] Brian Schröder wrote:
> a minor correction:
>
> On 12/08/05, Julian Leviston <julian@coretech.net.au> wrote:
>> You'd probably want
>
> - puts "Please enter dollar amount":
> + puts "Please enter dollar amount:"
> gets lineI'm almost certain he actually wants:
line = gets
--
http://ruby.brian-schroeder.de/
Stringed instrument chords: http://chordlist.brian-schroeder.de/
David A. Black wrote:
On Sat, 13 Aug 2005, [ISO-8859-1] Brian Schröder wrote:
> a minor correction:
>
> On 12/08/05, Julian Leviston wrote:
>> You'd probably want
>
> - puts "Please enter dollar amount":
> + puts "Please enter dollar amount:"
> gets lineI'm almost certain he actually wants:
line = gets
raise 'almost certain' #
------------------------------------------------------------ Kernel#gets
gets(separator=$/) => string or nil
------------------------------------------------------------------------
Returns (and assigns to $_) the next line from the list of files
in ARGV (or $*), or from standard input if no files are present
on the command line.
[...]
STDIN.gets is safer for this case, I think.
daz
Hi --
David A. Black wrote:
a minor correction:
You'd probably want
- puts "Please enter dollar amount":
+ puts "Please enter dollar amount:"
gets lineI'm almost certain he actually wants:
line = gets
raise 'almost certain' #
------------------------------------------------------------ Kernel#gets
gets(separator=$/) => string or nil
------------------------------------------------------------------------
Returns (and assigns to $_) the next line from the list of files
in ARGV (or $*), or from standard input if no files are present
on the command line.
[...]
Yes -- hence my original reply:
I doubt it, unless you've got some reason to expect the input to
terminate with whatever line contains
STDIN.gets is safer for this case, I think.
What would be the non-safeness of gets?
David
On Sat, 13 Aug 2005, daz wrote:
On Sat, 13 Aug 2005, [ISO-8859-1] Brian Schröder wrote:
On 12/08/05, Julian Leviston wrote:
--
David A. Black
dblack@wobblini.net
David A. Black wrote
> David A. Black wrote:
>
>>
>>> a minor correction:
>>>
>>>> You'd probably want
>>>
>>> - puts "Please enter dollar amount":
>>> + puts "Please enter dollar amount:"
>>> gets line
>>
>> I'm almost certain he actually wants:
>>
>> line = gets
>
>
> raise 'almost certain' #
>
> ------------------------------------------------------------ Kernel#gets
> gets(separator=$/) => string or nil
> ------------------------------------------------------------------------
> Returns (and assigns to $_) the next line from the list of files
> in ARGV (or $*), or from standard input if no files are present
> on the command line.
> [...]Yes -- hence my original reply:
I doubt it, unless you've got some reason to expect the input to
terminate with whatever line contains
I wasn't referring to your 'separator' note.
> STDIN.gets is safer for this case, I think.
What would be the non-safeness of gets?
David
Kernel#gets has a higher action when ARGV is non-empty.
On Sat, 13 Aug 2005, daz wrote:
>> On Sat, 13 Aug 2005, [ISO-8859-1] Brian Schröder wrote:
>>> On 12/08/05, Julian Leviston wrote:
#----------------------
ARGV.replace ["anyarg"]
line = gets # <--- STDIN.gets ---*
#----------------------
#-> C:/TEMP/rb80B3.TMP:2:in `gets': No such file or directory - anyarg (Errno::ENOENT)
Quoting the OP:
"I would like the prompt to display and the user to be able to enter the
data after the prompt."
No mention of: "... unless he supplies a C/L argument, in which case
treat it as a file and read the input from there instead."
Therefore:
> > STDIN.gets is safer for this case, I think.
daz