shell

#!/bin/bash -x
#########!/bin/bash -x
###http://10798301.blog.51cto.com/
####http://blog.csdn.net/zw_1510
#########https://github.com/lenomirei/project

<<"com"
############  .(){ .|. & } ; .################
.|.  函数名 . | 管道 递归调用函数并创建管道  & 置为后台进程
；起换作用   . 调用这个定义的函数
com

for((n=0;n<=10;n++))
do
set -x
echo "$n"
set +x
echo " "
done
read ee
echo "############  my read and addsum start ####################"

for((n=0;n<=100;n++))
do
echo "$n" >>0.txt
done
#cat 0.txt
echo "################################"

sum=0
max=0
min=0

while read LINE
do
#echo $LINE
#echo "$sum+$LINE"| bc
if [ $max -lt $LINE ];then
max=$LINE
fi
[ $min -gt $LINE ]&&{
min=$LINE
}

let  sum+=$LINE

done  < 0.txt
echo  "sum===="$sum
echo  "max===="$max
echo  "min===="$min
rm  0.txt
# for  i  in  `cat 0.txt`
# do
#   echo $i
#  done
#read ee

#for((n=0;n<=100;n++))
#do
#    tmp=`cat 0.txt`
#  echo "$tmp   $n " >>0.txt
#done
#cat 0.txt

#echo $line
echo "############  my read and addsum end ####################"
exit
read ee
echo "scale=4;1/3" | bc
echo "obase=2;scale=4;1/3" | bc
echo "sqrt(100)" | bc
read ee
read x
case $x in
1[1-9] )  echo "1:$x"
;;
2? )  echo "2:$x"
;;
* )  echo "default:$x"
;;
esac
read ee

i=0
until [ $i -gt 10 ]
do
let i++
echo $i
done

read ee
i=0
while [ $i -lt 10 ]
do
let i++
echo $i
done

#for i  in {a..z}
for  ((i=0;i<10;i++))
do
echo "$i"
done

echo "############ myfun start ####################"
function myfun()
{
shift 1
echo "\$0->"$0
echo "\$1->"$1
echo "\$2->"$2
echo "\$#->"$#
echo "\$$->"$$
return 257
}
myfun argv1  argv2  argv3
echo $?   ##1      256+1
echo "############  myfun end ####################"

echo "#########   proc  start #######################"
i=0
str=""
arr=("|" "/" "--" "\\")
while [ $i -le 70 ]
do
let index=i%4
printf "[%-100s][%d%%][%c]\r" "$str" "$i" "${arr[$index]}"
sleep 0.1
let i++
str+='#'
done
echo "#########   proc  end #######################"