linux-hw/4/suits.sh

#!/bin/bash

declare -a color=("spade" "heart" "club" "diamond")
declare -a point=("A" "2" "3" "4" "5" "6" "7" "8" "9" "10" "J" "Q" "K")

function seed_random() {
  local min=$1
  local max=$2
  seq $1 $2 | shuf -n $(($2-$1+1))
}

function deal_cards() {
  local cards=$1
  local beg=$2
  local end=$3
  local cnt=0
  for i in $cards
  do
    if [ $cnt -eq $end ];then
      return
    fi
    if [ $cnt -ge $beg ];then
      printf ${color[$(($i%4))]}${point[$(($i%13))]}" "
    fi
    cnt=$(($cnt+1))
  done
}

function main() {
  card_idx=$(seed_random 0 51)
  printf "first one: "
  deal_cards "$card_idx" 0 13
  printf "\nsecond one: "
  deal_cards "$card_idx" 13 26
  printf "\nthird one: "
  deal_cards "$card_idx" 26 39
  printf "\nfourth one: "
  deal_cards "$card_idx" 39 52
}

main