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/bashclearechoecho "###################################################################"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 INPUTdeclare PASSWORDdeclare Adeclare Bdeclare Xdeclare Ydeclare LOOP#This funtion init the variable PASSWORD that user need to guessinit_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 keyboardinput(){ echo -n "please input a number between 0000-9999:" read INPUT echo $INPUT | grep '^[0-9]\{4\}$' >/dev/null 2>&1 if [ $? != 0 ] then echo "retry a number between 0000-9999 and do not input a char" input else judge fi}#This funtion is the main funtionjudge(){ X=$INPUT Y=$PASSWORD while [ $INPUT != $PASSWORD ] do A=0 B=0 judge_a judge_b LOOP=`expr $LOOP + 1` echo "****************************" echo "* "$A"A"$B"B *" echo "****************************" input done}#This funtion count the variable A's valuejudge_a(){ for i in `seq 4` do VAR_INPUT=`expr substr "$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 $Y "$[$i+1]" 4` judge_a fi done done}#This funtion count the variable B's valuejudge_b(){ for i in `seq 4` do VAR_INPUT=`expr substr "$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 scriptLOOP=1init_passwordecho "#############################################"echo "#congratulations!You have tried $LOOP times! #"echo "# The password is $PASSWORD ! #"echo "#############################################"
