#!/bin/bash

#4桁の答えとなる数字を,重複しないように1桁目から順に決定する.

x1=`expr $RANDOM % 8 + 1`

 while :
  do
   x2=`expr $RANDOM % 8 + 1`
    if [ $x2 -ne $x1 ]
     then break
    fi
  done

 while :
  do
   x3=`expr $RANDOM % 8 + 1`
    if [ $x3 -ne $x1 -a $x3 -ne $x2 ]
     then break
    fi
  done

 while :
  do
   x4=`expr $RANDOM % 8 + 1`
    if [ $x4 -ne $x1 -a $x4 -ne $x2 -a $x4 -ne $x3 ]
     then break
    fi
  done

ra=""$x1""$x2""$x3""$x4""
#正答の完成. x1-x4は,それぞれ1桁目-4桁目に対応する.

echo "Right answer is $ra." >> quiz3.txt
#正答を,"quiz3.txt"に出力する.

n=1
#回答数のカウンターをまず1にする.

echo 'Type your first answer!'
#予想の回答を促す.

   read answer

   #入力した4桁の数字を1桁ずつ読み込み,重複がある場合は打ち直しを促す.

   y1=`echo "$answer" | cut -c1`
   y2=`echo "$answer" | cut -c2`
   y3=`echo "$answer" | cut -c3`
   y4=`echo "$answer" | cut -c4`

   if [ $y1 = $y2 -o $y1 = $y3 -o $y1 = $y4 -o $y2 = $y3 -o $y2 = $y4 -o $y3 = $y4 ]
    then echo 'Your Answer has some OVERLAPPED DIGITS. Try Again.'
    continue
   fi

   echo $answer >> quiz3.txt
   #最初の回答を出力する.

    until [ $answer = $ra ]
    #答えが正しくなるまでループを繰り返す.

     do

      #Hitの数を計算する.

      if [ $y1 = $x1 ]
       then h1=1
       else h1=0
      fi
      if [ $y2 = $x2 ]
       then h2=1
       else h2=0
      fi
      if [ $y3 = $x3 ]
       then h3=1
       else h3=0
      fi
      if [ $y4 = $x4 ]
       then h4=1
       else h4=0
      fi
      hit=`expr $h1 + $h2 + $h3 + $h4`

      #Blowの数を計算する.

      if [ $y1 = $x2 -o $y1 = $x3 -o $y1 = $x4 ]
       then b1=1
       else b1=0
      fi
      if [ $y2 = $x1 -o $y2 = $x3 -o $y2 = $x4 ]
       then b2=1
       else b2=0
      fi
      if [ $y3 = $x1 -o $y3 = $x2 -o $y3 = $x4 ];
       then b3=1
       else b3=0
      fi
      if [ $y4 = $x1 -o $y4 = $x2 -o $y4 = $x3 ]
       then b4=1
       else b4=0
      fi
      blow=`expr $b1 + $b2 + $b3 + $b4`

      echo "$hit Hit $blow Blow"
      echo "$hit Hit $blow Blow" >> quiz3.txt
      #HitとBlowの数を表示し,次の回答を入力/出力する. 重複がある場合は打ち直しを促す.


      n=`expr $n + 1`
      #回答回数をカウントして,次のループへ移行する.

      read answer
      #新たに読み込む.

      y1=`echo "$answer" | cut -c1`
      y2=`echo "$answer" | cut -c2`
      y3=`echo "$answer" | cut -c3`
      y4=`echo "$answer" | cut -c4`

      if [ $y1 = $y2 -o $y1 = $y3 -o $y1 = $y4 -o $y2 = $y3 -o $y2 = $y4 -o $y3 = $y4 ]
       then echo 'Your Answer has some OVERLAPPED DIGITS. Try Again.'
       continue
      fi

      echo $answer >> quiz3.txt

     done

echo "Your number matches the answer!!"
echo "You answered $n times to get the answer."
echo "Your number matches the answer!!" >> quiz3.txt
echo "You answered $n times to get the answer." >> quiz3.txt
#正解すると,メッセージと合計回答数を表示して終了する.