shell脚本2048小游戏

以下是一个简单的 shell 脚本 2048 小游戏，你可以在终端中运行它：

#!/bin/bash

# 初始化游戏
declare -A board
score=0
gameover=false

function init_board {
  for i in {0..3}; do
    for j in {0..3}; do
      board[$i,$j]=0
    done
  done
  add_number
  add_number
}

function add_number {
  local empty=()
  for i in {0..3}; do
    for j in {0..3}; do
      if [[ ${board[$i,$j]} -eq 0 ]]; then
        empty+=($i,$j)
      fi
    done
  done
  if [[ ${#empty[@]} -gt 0 ]]; then
    local idx=$(( RANDOM % ${#empty[@]} ))
    local pos=${empty[$idx]}
    local val=$(( RANDOM % 2 * 2 + 2 ))
    board[${pos%,*},${pos#*,}]=$val
  fi
}

function move_left {
  local moved=false
  for i in {0..3}; do
    for j in {1..3}; do
      local k=$j
      while [[ $k -gt 0 && ${board[$i,$((k-1))]} -eq 0 ]]; do
        board[$i,$((k-1))]=${board[$i,$k]}
        board[$i,$k]=0
        k=$((k-1))
        moved=true
      done
      if [[ $k -gt 0 && ${board[$i,$((k-1))]} -eq ${board[$i,$k]} ]]; then
        board[$i,$((k-1))]=$(( ${board[$i,$k]} * 2 ))
        score=$((score + ${board[$i,$((k-1))]}))
        board[$i,$k]=0
        moved=true
      fi
    done
  done
  $moved
}

function move_right {
  local moved=false
  for i in {0..3}; do
    for j in {2..0..-1}; do
      local k=$j
      while [[ $k -lt 3 && ${board[$i,$((k+1))]} -eq 0 ]]; do
        board[$i,$((k+1))]=${board[$i,$k]}
        board[$i,$k]=0
        k=$((k+1))
        moved=true
      done
      if [[ $k -lt 3 && ${board[$i,$((k+1))]} -eq ${board[$i,$k]} ]]; then
        board[$i,$((k+1))]=$(( ${board[$i,$k]} * 2 ))
        score=$((score + ${board[$i,$((k+1))]}))
        board[$i,$k]=0
        moved=true
      fi
    done
  done
  $moved
}

function move_up {
  local moved=false
  for j in {0..3}; do
    for i in {1..3}; do
      local k=$i
      while [[ $k -gt 0 && ${board[$((k-1)),$j]} -eq 0 ]]; do
        board[$((k-1)),$j]=${board[$k,$j]}
        board[$k,$j]=0
        k=$((k-1))
        moved=true
      done
      if [[ $k -gt 0 && ${board[$((k-1)),$j]} -eq ${board[$k,$j]} ]]; then
        board[$((k-1)),$j]=$(( ${board[$k,$j]} * 2 ))
        score=$((score + ${board[$((k-1)),$j]}))
        board[$k,$j]=0
        moved=true
      fi
    done
  done
  $moved
}

function move_down {
  local moved=false
  for j in {0..3}; do
    for i in {2..0..-1}; do
      local k=$i
      while [[ $k -lt 3 && ${board[$((k+1)),$j]} -eq 0 ]]; do
        board[$((k+1)),$j]=${board[$k,$j]}
        board[$k,$j]=0
        k=$((k+1))
        moved=true
      done
      if [[ $k -lt 3 && ${board[$((k+1)),$j]} -eq ${board[$k,$j]} ]]; then
        board[$((k+1)),$j]=$(( ${board[$k,$j]} * 2 ))
        score=$((score + ${board[$((k+1)),$j]}))
        board[$k,$j]=0
        moved=true
      fi
    done
  done
  $moved
}

function print_board {
  clear
  echo -n "Score: $score"
  for i in {0..3}; do
    echo
    for j in {0..3}; do
      printf "%4s" ${board[$i,$j]}
    done
  done
  echo
}

function check_gameover {
  for i in {0..3}; do
    for j in {0..3}; do
      if [[ ${board[$i,$j]} -eq 0 ]]; then
        return
      fi
      if [[ $i -lt 3 && ${board[$i,$j]} -eq ${board[$((i+1)),$j]} ]]; then
        return
      fi
      if [[ $j -lt 3 && ${board[$i,$j]} -eq ${board[$i,$((j+1))]} ]]; then
        return
      fi
    done
  done
  gameover=true
}

function play_game {
  init_board
  while ! $gameover; do
    print_board
    read -s -n1 dir
    case $dir in
      a) move_left;;
      d) move_right;;
      w) move_up;;
      s) move_down;;
      *) continue;;
    esac
    add_number
    check_gameover
  done
  print_board
  echo "Game over! Your score is: $score"
}

play_game

运行时，你可以通过输入a、s、d、w来控制方块的移动。注意，脚本需要在支持 Bash 的终端中运行。