``` set /a count+=1 ```

这段代码是一个Windows命令行中的批处理脚本代码。它的作用是将变量`count`的值加1。

- `set`是一个用于设置或修改环境变量的命令。
- `/a`选项表示后面的表达式是一个算术表达式。
- `count+=1`表示将变量`count`的值加1，并将结果赋值给`count`变量。

这段代码可以用于实现计数器功能，每次执行该代码，`count`变量的值都会增加1。

相关问题

set /a "rand=(%random%*%count%/32768)+1"

这是一个 Windows 命令行下的随机数生成命令，用于生成 1 到 count 之间的随机整数。其中，%random% 是一个系统环境变量，它能够返回一个 0 到 32767 之间的随机整数。而 set /a 是一个命令行参数，用于进行算术运算并将结果赋值给指定的变量。因此，这个命令先将 %random% 乘以 count，然后除以 32768（32768 是一个常数，它保证了结果是一个在 [0, count] 之间的整数），最后加上 1，得到的结果就是一个在 [1, count] 之间的随机整数。

将如下bat脚本转换为shell脚本语言：@echo off set count=0 dir E:\ > nul 2>&1 if not %errorlevel% == 0 ( (echo E not exist) & pause && exit ) else ( (echo E exist) ) setlocal enabledelayedexpansion :loop for /f "skip=1 tokens=1" %%a in ('adb devices') do ( if not "%%a"=="List" ( set /a count+=1 ) ) if %count% gtr 0 ( echo found %count% devices goto end ) else ( echo device list is empty goto loop ) :end :read sn :: 将文件系统挂载为可写 adb root adb remount :: 获取当前时间戳，格式为yyyymmdd_hhmmss set timestamp=%date:~0,4%%date:~5,2%%date:~8,2%_%time:~0,2%%time:~3,2%%time:~6,2% :: 获取设备SN set retry_times=0 :get sn for /f "delims=" %%i in ('adb shell getprop ro.serialno') do set "devicesn=%%i" set /a "retry_times=retry_times+1" if not defined devicesn ( if %retry_times% leq 2 ( echo Failed to read device SN, try again. Retry count= %retry_times% goto :get sn ) else ( echo Failed to read device SN after multiple retries, please check the connection and try again later. pause && exit ) ) echo devicesn=%devicesn% timestamp=%timestamp% :: 以设备序列号和时间戳为文件夹名创建目录 set device_dir=%devicesn%_%timestamp% md "E:\Raven_DualCam\%device_dir%" && echo create "%device_dir%" success if %errorlevel% neq 0 ( echo create "%device_dir%" fail pause && exit ) :: 将指定的文件pull到E盘 adb pull /mnt/vendor/persist/camera/dualcam_cali.bin E:\Raven_DualCam\%device_dir%\dualcam_cali.bin adb pull /mnt/sdcard/DCIM/DoubleCam E:\Raven_DualCam\%device_dir%\DoubleCam pause

#!/bin/bash

count=0
ls /E > /dev/null 2>&1

if [ $? -ne 0 ]
then
echo "E not exist"
read -p "Press any key to continue..." -n1 -s
exit
else
echo "E exist"
fi

while true
do
count=0
for device in $(adb devices | awk 'NF==2{print $1}')
do
if [ $device != "List" ]
then
((count++))
fi
done

if [ $count -gt 0 ]
then
echo "found $count devices"
break
else
echo "device list is empty"
fi
done

devicesn=""
retry_times=0

while [ -z "$devicesn" ]
do
devicesn=$(adb shell getprop ro.serialno | tr -d '\r')
((retry_times++))

if [ -z "$devicesn" ]
then
if [ $retry_times -le 2 ]
then
echo "Failed to read device SN, try again. Retry count=$retry_times"
else
echo "Failed to read device SN after multiple retries, please check the connection and try again later."
read -p "Press any key to continue..." -n1 -s
exit
fi
fi
done

echo "devicesn=$devicesn"

timestamp=$(date +"%Y%m%d_%H%M%S")
echo "timestamp=$timestamp"

device_dir="$devicesn"_"$timestamp"
mkdir -p "/E/Raven_DualCam/$device_dir" && echo "create $device_dir success"

if [ $? -ne 0 ]
then
echo "create $device_dir fail"
read -p "Press any key to continue..." -n1 -s
exit
fi

adb root
adb remount

adb pull /mnt/vendor/persist/camera/dualcam_cali.bin "/E/Raven_DualCam/$device_dir/dualcam_cali.bin"
adb pull /mnt/sdcard/DCIM/DoubleCam "/E/Raven_DualCam/$device_dir/DoubleCam"

read -p "Press any key to continue..." -n1 -s