battleship game

battleship.md

hash-happy pseudocode for text-based battleship game

based on rules from http://www.hasbro.com/common/instruct/battleship.pdf

---

• start_game

setup variables to simulate a grid

• grid_value = 8

• computer_squares = an empty hash

• player_squares = an empty hash

• grid_letter = a

• grid_number = 1

• square_status = 'no_ship'

• hit = 'hit'

###set contender to be player || computer #later can be adapted easily to allow more than 2 players. for now, contender & not_contender.

• setup contender_squares hashes, which requires you to pass in contender
  • unless grid_value is 0
    • create a two char key of square_name (aka square_name) with a value of square_status
    • push the item into the #{contender}_squares hash
    • add/increment 1 grid_letter to grid_letter
    • add 1 grid_number to grid_number
    • decrease grid_value by 1
  • end
• end

stock players with ships

there is a set of ships for each player, with key of ship_name and value of ship_length

• ships = {'carrier' => 5, 'battleship' => 4, 'cruiser' => 3, 'submarine' => 3, 'destroyer' => 2}

• create hashes for ship sets: #{contender}_ships = ships, and then #{not_contender}_ships = ships

place #{contender}_ships on #{contender}_squares

• for each ship
  • randomly find a placement, which is #rules out diagonal && non-connecting squares from being played
    • ship_length computer_squares in the list where either all ship_length grid_letter or
      • ship_length grid_numbers are in a row (computer will need more instructions on this, aka grid_check) and
        • each square has a square_status of square_status
  • after placement, change each square_status to ship_name
• end

draw squares for the human as a grid, called grid_graphic with argument of contender

• make grid graphic that varies based on status of each square
  • puts contender.capitalize + ''s ' + 'Ocean'
  • arrange the grid from contender + '_' + 'squares' hash with letters incremented horizontally and numbers incremented vertically
  • if grid_status == 'no_ship'
    • show square_name on each contender + '_' + 'square'
  • elsif grid_status like '%_hit'
    • show 'x' on each contender + '_' + 'square'
  • else
    • show ship_name on each contender + '_' + 'square'
  • end

prompt human to place player_ships on player_squares

• show grid_graphic(player)
• until there are no more player_ships
  • show the human their list of player_ships keys
  • ask the human to type the name of the ship from player_ships they'd like to place on the board and name it selected_ship
  • remove selected_ship from player_ships
  • show grid_graphic(player)
  • ask the human to type in square_name ship_length number of player_squares
  • if grid_check of ship_length player_squares
    • change each player_square's square_status to ship_name
  • else
    • prompt the human to give you ship_length player_squares that will pass a grid check
  • end
• end

###set contender #will this interfere w above use of contender?

• randomly select player or computer to be the contender and go first
• contender = player || computer

###game play. need to pass in contender

• show grid_graphic(not_contender)

• if contender == 'player'

  • ask human to enter square_name they'd like to hit, aka selected_#{not_contender}_square #not_contender is pretty negative!

• else

  • have computer randomly select item from player_squares where square_status is not like '%_hit'

• end

• if selected_#{not_contender}_square square_status is like '%_hit'

  • puts 'Too bad. You already played that square! Start your turn over.' #this isn't in the rules...

• else

  • if square_status for selected_#{not_contender}_square is like '%no_ship'
    • puts 'Miss.'
  • else
    • puts "Hit. #{square_status}" #this will be ship_name
    • change square_status to square_status + '_' + 'hit'
  • if #{not_contender}_squares has any value ship_name for ship_length number of times #can you do this on a value?
    • puts 'You sunk computer's #{ship_name}' for that computer_ship
  • else
  • end

• if #{not_contender}_squares has any value ship_name for ship_length number of times for all #{not_contender}_ships

  • if contender == player
    • puts 'Congratulations! You sunk all of #{not_contender.capitalize}'s ships!' #could get fancy and ask name of player and set name of computer
  • else
    • puts "Sorry, #{not_contender.capitalize} sunk all your ships!"
  • end
  • show grid_graphic(computer)
  • show grid_graphic(player)
  • ask player 'Want to play again? Enter Yes or No.'
    • if player_input == like '%y' #need to ck on capitalization issues? need to deal with non-alpha chars?
      • start_game
    • else
      • 'Thanks for playing Battleship! Come on back now, ya hear?'
    • end

• else

• end