生成的密码和用户输入可以接受重复数字。

所以相对一般规则的猜数字可能难度要大不少。

本版本规则：

A--数字对，位置也对

B--排除A的结果后，数字对，但位置不对

开始后，系统化初始化一个4位可重复数字，如“1223”。假设用户第一次输入“1234”，那么系统将提示“2A1B”，前两位数字“12”相同并且位置也相同，为“2A”。后两位数字中，用户输入的“3”与密文中“3”相同，但两者位置不同，则为“1B”，最终结果为“2A1B”。

再假设用户此时输入“1232”，那么结果则为“2A2B”，计算方法与前次一样。

代码如下：

#!/bin/bash

clear

echo

echo "###################################################################"

echo "# this is a bash-shell game write by Email:breeze7086@gmail.com #"

echo "# the game called *digits*,and this version have repeated numbers #"

echo "# version 1.0 #"

echo "###################################################################"

echo -e "\n\n"

declare INPUT

declare PASSWORD

declare A

declare B

declare X

declare Y

declare LOOP

#This funtion init the variable PASSWORD that user need to guess

init_password()

{

PASSWORD=`echo $(($RANDOM%10000))`

echo $PASSWORD | grep '^[0-9]\{4\}$' >/dev/null 2>&1

if [ $? != 0 ]

then

init_password

else

input

fi

}

#This funtion accept the input from user's keyboard

input()

{

echo -n "please input a number between 0000-9999:"

read INPUT

echo $INPUT | grep '^[0-9]\{4\}$' >/dev/null 2>&1

if [ $? != 0 ]

then

echo "retry a number between 0000-9999 and do not input a char"

input

else

judge

fi

}

#This funtion is the main funtion

judge()

{

X=$INPUT

Y=$PASSWORD

while [ $INPUT != $PASSWORD ]

do

A=0

B=0

judge_a

judge_b

LOOP=`expr $LOOP + 1`

echo "****************************"

echo "* "$A"A"$B"B *"

echo "****************************"

input

done

}

#This funtion count the variable A's value

judge_a()

{

for i in `seq 4`

do

VAR_INPUT=`expr substr "$X" $i 1`

for j in `seq 4`

do

VAR_PASSWORD=`expr substr "$Y" $j 1`

if [[ $VAR_INPUT = $VAR_PASSWORD && $VAR_INPUT != "" && $VAR_PASSWORD != "" && $i = $j ]]

then

A=`expr $A + 1`

X=`expr substr $X 1 "$[$i-1]"``expr substr $X "$[$i+1]" 4`

Y=`expr substr $Y 1 "$[$i-1]"``expr substr $Y "$[$i+1]" 4`

judge_a

fi

done

done

}

#This funtion count the variable B's value

judge_b()

{

for i in `seq 4`

do

VAR_INPUT=`expr substr "$X" $i 1`

for j in `seq 4`

do

VAR_PASSWORD=`expr substr "$Y" $j 1`

if [[ $VAR_INPUT = $VAR_PASSWORD && $VAR_INPUT != "" && $VAR_PASSWORD != "" ]]

then

B=`expr $B + 1`

X=`expr substr "$X" 1 "$[$i-1]"``expr substr "$X" "$[$i+1]" 4`

Y=`expr substr "$Y" 1 "$[$j-1]"``expr substr "$Y" "$[$j+1]" 4`

judge_b

fi

done

done

}

#This is the begin of script

LOOP=1

init_password

echo "#############################################"

echo "#congratulations!You have tried $LOOP times! #"

echo "# The password is $PASSWORD ! #"

echo "#############################################"