math_game.rb

require 'pry'
require_relative 'player'

# Two player math game.
class MathGame

  RANDOM_MAX = 5

  # Starts the program.
  def initialize

    ask_player_names
  end

  def ask_player_names

    puts "Please enter a name for player 1."
    player1_name = gets.strip!.squeeze(' ')
    puts "Please enter a name for player 2."
    player2_name = gets.strip!.squeeze(' ')

    create_players(player1_name, player2_name)
  end

  def create_players(player1_name, player2_name)

    @player1 = Player.new(player1_name)
    @player2 = Player.new(player2_name)

    @players = [@player1, @player2]

    game(@players)
  end
 
  def generate_random_number
    rand(RANDOM_MAX+1)
  end

  def game(players)

    # binding.pry

    until @player1.failures == 3 || @player2.failures == 3

      @players.each do |player|

        # binding.pry

        generate_question(player.name)
        prompt_player_for_answer
        verify_answer(@answer)
        puts "#{@answer_result}"

        if @answer_result == false
          player.failures += 1
          if player.failures == 3
            puts "#{player.name} has lost!"
            puts "Final Score"
            puts "#{@player1.name} rounds won: #{@player1.successes} || rounds lost: #{@player1.failures}"
            puts "#{@player2.name} rounds won: #{@player2.successes} || rounds lost: #{@player2.failures}"
            break
          end
        else
          player.successes += 1
        end
        puts "#{@player1.name} has won #{@player1.successes} rounds and failed #{@player1.failures} rounds."
        puts "#{@player2.name} has won #{@player2.successes} rounds and failed #{@player2.failures} rounds."
      end
    end
  end

  def generate_question(player)
    @num1, @num2 = generate_random_number, generate_random_number
    puts "#{player}, what is #{@num1} + #{@num2}?"
  end

  def prompt_player_for_answer
    @answer = gets.strip!.to_i
  end

  def verify_answer(answer)
    @answer_result = (@num1 + @num2 == answer)
  end

end

game = MathGame.new
puts game

player.rb

class Player

  attr_reader :name
  attr_accessor :failures, :successes

  def initialize(name)

    @name = name
    @failures = 0
    @successes = 0

  end

  def gain_a_point
    @successes += 1
  end

  def lose_a_life
    @failures += 1
  end

end