[Level 3] 1A2B shell game

Another game.

#!/usr/bin/bash

showUsage() {

  cat <<EOF

Usage:

  $0

Ex.

  $0

EOF

}



getNum() {

  #set -vx

  sNum="0|1|2|3|4|5|6|7|8|9"

  sAns=""

  declare -i n1=$RANDOM*10/32767+1

  declare -i n2=$RANDOM*9/32767+1

  declare -i n3=$RANDOM*8/32767+1

  declare -i n4=$RANDOM*7/32767+1

  s=`echo $sNum | cut -d'|' -f$n1` && sAns=$sAns$s && sNum=`echo $sNum | sed -e "s/$s//" | sed -e 's/||/|/g' | sed -e 's/^|//g' | sed -e s'/|$//'`

  s=`echo $sNum | cut -d'|' -f$n2` && sAns=$sAns$s && sNum=`echo $sNum | sed -e "s/$s//" | sed -e 's/||/|/g' | sed -e 's/^|//g' | sed -e s'/|$//'`

  s=`echo $sNum | cut -d'|' -f$n3` && sAns=$sAns$s && sNum=`echo $sNum | sed -e "s/$s//" | sed -e 's/||/|/g' | sed -e 's/^|//g' | sed -e s'/|$//'`

  s=`echo $sNum | cut -d'|' -f$n4` && sAns=$sAns$s && sNum=`echo $sNum | sed -e "s/$s//" | sed -e 's/||/|/g' | sed -e 's/^|//g' | sed -e s'/|$//'`

  echo $sAns

}



# check $sAns $sGuess

checkNum() {

  sAns=$1

  sGuess=$2

  declare -i A=0

  declare -i B=0

  sA1=`echo ${sAns:0:1}`

  sA2=`echo ${sAns:1:1}`

  sA3=`echo ${sAns:2:1}`

  sA4=`echo ${sAns:3:1}`

  sG1=`echo ${sGuess:0:1}`

  sG2=`echo ${sGuess:1:1}`

  sG3=`echo ${sGuess:2:1}`

  sG4=`echo ${sGuess:3:1}`

  if [ $sAns == $sGuess ]

  then

    echo "Bingo...($sOAns:$sGuess)" && return 0

  else

    [ "$sA1" == "$sG1" ] && A=$A+1 && sAns=`echo $sAns | sed -e "s/$sA1//"`

    [ "$sA2" == "$sG2" ] && A=$A+1 && sAns=`echo $sAns | sed -e "s/$sA2//"`

    [ "$sA3" == "$sG3" ] && A=$A+1 && sAns=`echo $sAns | sed -e "s/$sA3//"`

    [ "$sA4" == "$sG4" ] && A=$A+1 && sAns=`echo $sAns | sed -e "s/$sA4//"`

    echo $sAns | grep $sG1 >/dev/null && B=$B+1

    echo $sAns | grep $sG2 >/dev/null && B=$B+1

    echo $sAns | grep $sG3 >/dev/null && B=$B+1

    echo $sAns | grep $sG4 >/dev/null && B=$B+1

    echo $sGuess: $A"A"$B"B ..." >> $0.log

    cat $0.log

    return 1

  fi

}



######################################################## main



sOAns=`getNum`

#echo "sOAns=$sOAns"

declare -i nCount=0

cat /dev/null > $0.log

while true

do

  read -p "Please enter 4 digit number or quit (you have guess $nCount times): " sGuess

  [ `echo $sGuess | awk '{print(length($1))}'` -ne 4 ] && echo "shorter then 4 digits..." && continue

  [ $sGuess == "quit" ] && echo "The answer is: $sOAns" && break

  checkNum $sOAns $sGuess && break

  nCount=$nCount+1

done

rm $0.log

Wish this helps.

regards,
Stanley Huang