germangame.rb

class Player
  attr_accessor :name, :score, :lives

  def initialize(name)
    @lives = 3
    @score = 0
    @name = name
  end

  def lose_life
    self.lives -= 1
  end

  def gain_point
    self.score += 1
  end
end

class Problem
  attr_accessor :number1, :number2

  def initialize
    self.number1 = rand(1..20)
    self.number2 = rand(1..20)
  end

  def answer
    number1 + number2
  end

  def answer_correct?(test_number)
    answer == test_number
  end

  def to_s
    "What's #{number1} + #{number2}?"
  end
end

class Game
  attr_accessor :player1, :player2

  def get_input(prompt)
    puts prompt
    gets.chomp
  end

  def players_have_lives
    player1.lives > 0 && player2.lives > 0
  end
  
  def game_loop
    while players_have_lives
      problem = Problem.new
      
    end
  end

  def setup
    self.player1 = Player.new(get_input("Player 1, enter your name:"))
    self.player2 = Player.new(get_input("Player 2, enter your name:"))
  end

  class << self
    def run
      game = Game.new
      game.setup
      game.game_loop
      game.print_scores
    end
  end
end

Game.run