From: Peter Hickman <peterhickman386@...>
Date: 2012-01-25T05:22:57+09:00
Subject: Re: How do I go back to a specic part of the program?

Here's a little rewrite, note two things:

1) The use of the initialize method
2) The complete lack of variables that simply hold copies of the
values held in an object

It's a start

class Creature
  attr_reader :name, :attack, :hp

  def initialize(name, attack, hp)
    @name = name
    @attack = attack
    @hp = hp
  end

  def damage(attack)
    @hp -= attack
  end

  def alive?
    @hp > 0
  end
end

hero = Creature.new("Levi", 10, 100)
frog = Creature.new("Frog", 1, 10)
rat = Creature.new("Rat", 3, 20)
rabbit = Creature.new("Rabbit", 4, 25)
snake = Creature.new("Snake", 8, 25)

while hero.alive?
  puts "What would you like to do?"
  action = gets.chomp

  case action
  when 'attack'
    puts "Which enemy would you like to get?"
    enemy = gets.chomp
    my_enemy = nil

    case enemy
    when "frog"
      my_enemy = frog
    when "rat"
      my_enemy = rat
    when "rabbit"
      my_enemy = rabbit
    when "snake"
      my_enemy = snake
    end

    if my_enemy
      if my_enemy.alive?
        my_enemy.damage(hero.attack)
        if my_enemy.alive?
          puts "You deal the #{my_enemy.name} #{hero.attack} points of
damage, it retaliates"
          hero.damage(my_enemy.attack)
          puts "The #{my_enemy.name} deals you #{my_enemy.attack}
points of damage"
        else
          puts "Splat, the #{my_enemy.name} is dead"
        end
      else
        puts "He's dead Jim"
      end
    else
      puts "You viciously attack a #{enemy}, which ignores you because
you can't spell"
    end
  when "walk"
    puts "You are walking man"
  else
    puts "please enter a valid action"
  end
end

puts "You died"