CODEWITHSUNDEEP
rubyobjectparametersarguments
Natheus
Natheus

Reputation: 19

An object as a parameter/argument in Ruby?

I've been messing around in Ruby, thinking of making simple little RPG games. It's been going decently (already have character creation mostly done). But, I was having trouble finding out how to make an attack method (or other kinds of targeted methods, like healing). For example, the method would take a "user" parameter and "target" parameter. It would use the user's stats to influence the target's HP. I've looked for info on this, but I haven't been able to "get" what the threads were about. I'm a beginner, so I'm not even sure if they were speaking of what I'm trying to find out.

Here's basically what I want. Of course, this doesn't work:

 class Enemy
      attr_accessor :hp, :power
      def initialize (hp, power)
           @hp = hp
           @power = power
      end
 end
 class Hero
      attr_accessor :hp, :power
      def initialize (hp, power)
           @hp = hp
           @power = power
      end
 end

 monster = Enemy.new(7,3)
 dude = Hero.new(10,5)

 def attack(user,target)
      user.hp - target.power
 end

 puts "Dude's HP is #{dude.hp}, and power is #{dude.power}"
 puts "Monster's HP is #{monster.hp}, and power is #{monster.power}"

 puts " "

 puts "Dude attacks!"

 attack(dude, monster)

 puts "Dude's HP is #{dude.hp}, and power is #{dude.power}"
 puts "Monster's HP is #{monster.hp}, and power is #{monster.power}"

 puts " "

 puts "Monster attacks!"

 attack(monster, dude)

 puts "Dude's HP is #{dude.hp}, and power is #{dude.power}"
 puts "Monster's HP is #{monster.hp}, and power is #{monster.power}"

 x = gets

I apologize if this is an extremely noobie question, but I'm just not finding it. If another post has the answer (in a way I can understand), please point me to it.

Perhaps I should also give my code for character creation and stats, so you know what I'm working with?

Thank you for reading my question, and hopefully answering.

Upvotes: 1

Views: 500

Answers (1)

DjezzzL
DjezzzL

Reputation: 845

Try this one:

def attack(user,target)
  user.hp -= target.power
end

But I really think you should write it with OOP style like:

class Common
  attr_accessor :hp, :power

  def initialize(hp, power)
    self.hp = hp
    self.power = power
  end

  def hit(target)
    p "#{self.class} hits #{target.class}"
    target.hp = [target.hp - power, 0].max # you don't want hp less then 0 possible
  end
end

class Hero < Commom; end
class Enemy < Common; end

Then use it like

monster = Enemy.new(7,3)
dude = Hero.new(10,5)

moster.hit(dude)
dude.hit(monster)

Upvotes: 2

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