Data commit

Task/21-game/UNIX-Shell/21-game.sh

@@ -0,0 +1,135 @@
+shopt -s expand_aliases
+alias bind_variables='
+{
+  local -ri goal_count=21
+  local -ri player_human=0
+  local -ri player_computer=1
+  local -i turn=1
+  local -i total_count=0
+  local -i input_number=0
+  local -i choose_turn=0
+}
+'
+whose_turn() {
+  case $(( ( turn + choose_turn ) % 2 )) in
+   ${player_human}) echo "player";;
+   ${player_computer}) echo "computer";;
+  esac
+}
+next_turn() {
+  let turn++
+}
+validate_number() {
+  ! test ${input_number} -ge 1 -a ${input_number} -le $( max_guess )
+}
+prompt_number() {
+  local prompt_str
+  test $( max_guess ) -eq 1 && {
+    prompt_str="enter the number 1 to win"
+  true
+  } || {
+    prompt_str="enter a number between 1 and $( max_guess )"
+  }
+  while [ ! ]
+  do
+   read -p "${prompt_str} (or quit): "
+   input_number=${REPLY}
+   case ${REPLY} in
+    "quit") {
+      false
+      return
+    } ;;
+   esac
+   validate_number || break
+   echo "try again"
+  done
+}
+update_count() {
+  let total_count+=input_number
+}
+remaining_count() {
+  echo $(( goal_count - total_count ))
+}
+max_guess() {
+  local -i remaining_count
+  remaining_count=$( remaining_count )
+  case $( remaining_count ) in
+    1|2|3) echo ${remaining_count} ;;
+    *) echo 3 ;;
+  esac
+}
+iter() {
+  update_count
+  next_turn
+}
+on_game_over() {
+  test ! ${input_number} -eq $( remaining_count ) || {
+    test ! "$( whose_turn )" = "player" && {
+      echo -ne "\nYou won!\n\n"
+    true
+    } || {
+      echo -ne "\nThe computer won!\nGAME OVER\n\n"
+    }
+    false
+  }
+}
+on_game_start() {
+  echo 21 Game
+  read -p "Press enter key to start"
+}
+choose_turn() {
+  let choose_turn=${RANDOM}%2
+}
+choose_number() {
+  local -i remaining_count
+  remaining_count=$( remaining_count )
+  case ${remaining_count} in
+   1|2|3) {
+     input_number=${remaining_count}
+   } ;;
+   5|6|7) {
+     let input_number=remaining_count-4
+   } ;;
+   *) {
+     let input_number=${RANDOM}%$(( $( max_guess ) - 1 ))+1
+   }
+  esac
+}
+game_play() {
+  choose_turn
+  while [ ! ]
+  do
+    echo "Total now ${total_count} (remaining: $( remaining_count ))"
+    echo -ne "Turn: ${turn} ("
+    test ! "$( whose_turn )" = "player" && {
+      echo -n "Your"
+    true
+    } || {
+      echo -n "Computer"
+    }
+    echo " turn)"
+    test ! "$( whose_turn )" = "player" && {
+      prompt_number || break
+    true
+    } || {
+      choose_number
+      sleep 2
+      echo "Computer chose ${input_number}"
+    }
+    on_game_over || break
+    sleep 1
+    iter
+  done
+}
+21_Game() {
+  bind_variables
+  on_game_start
+  game_play
+}
+if [ ${#} -eq 0 ]
+then
+ true
+else
+ exit 1
+fi
+21_Game