From: Gary Wright <gwtmp01@...>
Date: 2012-01-07T15:53:20+09:00
Subject: Re: "Have your program add one to the number" ?


On Dec 18, 2011, at 11:22 PM, Fellipe de Paula wrote:

> I'm starting to learn Ruby using the Learn to Program book by Chris
> Pine.
> 
> On a mini assignment I need to:
> 
> "Write a program which asks for a person's favorite number. Have your
> program add one to the number, then suggest the result as a bigger and
> better favorite number. (Do be tactful about it, though.) "
> 
> Here's what I have so far...
> 
> 1 full_name = first_name + ' ' + middle_name + ' ' + last_name
> 2 puts full_name + ', ' + 'What\'s your favorite number???'
> 3 favorite_number = gets.chomp
> 4 new_number = favorite_number.to_i + 1
> 5 puts 'hmmm... What about ' + new_number + '? ' + 'It\'s bigger and
> better than yours :)'
> 
> The program runs smoothly until line 4 than it returns the following
> error:
> 
> :in `+': can't convert Fixnum into String (TypeError)
> 
> Could you please point my mistake?


Are you sure the problem is on line 4?  Seems like it is more likely
that it is on line 5 where you try to put new_number into a new message.
That is where you need to convert it back to a string.

Gary Wright