Two Player Game

math_game

# Create a 2-player guessing game where players take turns to answer simple addition problems. 
#The math questions are automatically generated. 
#It should do this by picking two numbers between 1 and 20.
# Example prompt: "Player 1: What does 5 plus 3 equal?"
# Both players start with 3 lives. They lose a life if they mis-answer a question. 
#If a player gets a question wrong, the game should output the new scores for both players, so players know where they stand.
# The game doesn’t end until one of the players loses all their lives. 
#At this point, the game should announce who won and what the other player’s score is.
# As before, you can use gets.chomp to get input from users and puts for output.

require 'pry'

@player1_lives = 3 
@player2_lives = 3 
@current_player = 1

puts "Lets play a Two Player Math Game!"

def input_answer(operator, x, y)
  if operator == 1
    operator = ' + '
  elsif operator == 2
    operator =  ' - '
  else 
    operator = ' x '
  end 
    puts "Player #{@current_player} What is #{x} #{operator} #{y}?"
    gets.chomp.to_i
end 

def switch_player
  if @current_player == 1 
    @current_player = 2
    puts "You have #{@player1_lives} lives left"
  else 
    @current_player = 1
    puts "You have #{@player2_lives} lives left"
  end
end 

def player_lives
  return ((@player1_lives > 0) && (@player2_lives > 0)) ? true : false
end

def calc_answer(op, x, y)
  if op == 1
    return x + y
  elsif op == 2 
    return x - y
  else 
    return x * y
  end 
end 

def winner 
  if @player1_lives == 0 
    'Player 2 Wins!'
  else 
    'Player 1 Wins!'
  end 
end

def check_answer(answer, correct_answer)
  if answer == correct_answer 
    puts "That's Right!"
  else 
    if @current_player == 1
      @player1_lives -= 1
      puts "Incorrect #{@player1_lives}"
    else 
      @player2_lives -= 1
      puts "Incorrect #{@player2_lives}"
    end 
  end 
end 

loop do 
  x = rand(20) + 1 
  y = rand(20) + 1
  op = rand(1..3)

right_answer = calc_answer(op, x, y)
answer = input_answer(op, x, y)
check_answer(answer, right_answer)
switch_player

  break if player_lives == false
end