set %random%=%random%
复制代码

@echo off&setlocal enabledelayedexpansion
set %random%=%random%
for /f "delims=" %%i in ('set') do set str=%%i&goto start
:start
echo %str%
for /f "tokens=1,2 delims==" %%i in ("%str%") do set num=%%i%%j
:calc
set var=!num:~,1!
set /a s+=var
set /p=%var%+<nul
set num=!num:~1!
if defined num goto calc
set /p==!s!<nul
pause>nul
复制代码

@echo off&setlocal enabledelayedexpansion
set %random%=%random%
for /f "delims=" %%i in ('set') do set str=%%i&goto start
:start
echo %str%
:calc
set var=!str:~,1!
set /a s+=var
set /p=%var%+<nul 2>nul
set str=!str:~1!
if defined str goto calc
set /p==!s!<nul
pause>nul
复制代码

@setlocal enabledelayedexpansion
set %random%=%random%
@echo off
::没有在开头使用是为了对比检验结果。完全可以移到首行
for /l %%i in (0 1 32767) do (if defined %%i (set i=%%i)&goto next)
:next
::这里使用一个跳转是为了节约CPU资源，不直接跳转是为了防止出错。 
echo 随机变量为:%i%
echo 其值为:!%i%!
set num=0
set b=%i%
set c=!%i%!
for /l %%a in (0 1 4) do (
set /a num+=!b:~%%a,1!
set /a num+=!c:~%%a,1!
)
echo 各位数的和为:%num%
pause>nul
复制代码

@setlocal enabledelayedexpansion
set %random%=%random%
@echo off
for /l %%i in (0 1 32767) do (if defined %%i (set i=%%i)&goto next)
:next
echo 随机变量为:%i%
echo 其值为:!%i%!
set num=0
set b=%i%
set c=!%i%!
for /l %%a in (0 1 4) do (
set /a num+=!b:~%%a,1! 2>nul
set /a num+=!c:~%%a,1! 2>nul
)
echo 各位数的和为:%num%
pause>nul
复制代码

@echo off
:back
setlocal enabledelayedexpansion
set %random%=%random%
set /a man=1
set /a men=1
set /a num1=0
set /a num2=0
for /F "delims=" %%n IN ('set') DO (
if !man! EQU 1 (set flog=%%n)
set man=!man!+1 
)
for /f "delims== tokens=1,2" %%i in ("%flog%") do (
set ax1=%%i
set ax2=%%j
)
for /l %%a in (0 1 4) do (
set /a num1=!num1!+!ax1:~%%a,1! 2>nul 
set /a num2=!num2!+!ax2:~%%a,1! 2>nul
)
if %num1% EQU %num2% goto end
endlocal
goto back
:end
echo %ax1% and %ax2% are all %num1%
pause > nul 
复制代码

@echo off
setlocal enabledelayedexpansion
set /a a=%random%
set /a b=%random%
echo %a%=%b%
for /l %%i in (0,1,4) do (
set /a c1=c1+!a:~%%i,1! 
set /a c2=c2+!b:~%%i,1! )
set /a c=c1+c2
echo %c%
pause>nul
复制代码

 
@echo off
echo set %random%= %random% >>my.txt
for /f "tokens=2,3 delims== " %%i in (my.txt) do (
  echo varName--%%i *** varValue--%%j
  set x=%%i 
  set y=%%j
)

:xx 从左面截取一符号，放到右面，并添加“+”号，此时为字符串
set  x=%x:~1%+^%x:~,1%  
if "%x:~,1%" neq "+" goto xx else goto yy
rem 这里加引号，我实验了好多次才成功，花的时间主要在这个if中的引号上

:yy 对值进行循环移位，此时为字符串
set y=%y:~1%^+%y:~,1%  
if "%y:~,1%" neq "+"  goto yy 
del /q my.txt

:end 把字符串，通过set /a 自动转化为数值计算。
call echo varName=%%x%% 
set /a x=%x%0 &call echo %%x%%
call echo varValue=%%y%%
set /a y=%y%
call echo %%y%%
set /a total=%x%+%y%
call echo varName+varValue=%%total%%
echo. ok---bye
复制代码

    @echo off&setlocal enabledelayedexpansion
set %random%=%random%
for /f "delims=" %%i in ('set') do (set str=%%i&&goto A)
:A
for /f "delims== tokens=1,2" %%i in ("!str!") do (
	echo first=%%i second=%%j
	set "str=%%i%%j")
for /l %%i in (0 1 9) do (set "str=!str:%%i=+%%i!")
set /a t=!str!
echo total=!t!
pause
复制代码

@echo off
setlocal enabledelayedexpansion
set %random%=%random%
for /f "tokens=1,2 delims==" %%a in ('set^|findstr /b [0-9]') do (
    echo;变量%%a，其值%%b
    set var=%%a%%b
)
for /l %%i in (0,1,10) do (
    set /a n=%%i
    call set /a sum+=%%var:~!n!,1%% 2>nul
)
echo;各位数的和是%sum%&pause>nul
复制代码

@echo off
setlocal enabledelayedexpansion

set var_random=%random%
set !var_random!=%random%
set sumresult=0

echo %var_random%=!%var_random%!

REM 计算随机变量名的各位数字之和
call:GetSum %var_random%!%var_random%!
echo %var_random%!%var_random%!=!sumresult!

exit /b 0

:GetSum
set randomstr=%1

for /l %%i in (0,1,30) do (
	set tempnum1=!randomstr:~%%i, 1!
	if "!tempnum1!"=="" (
		goto EndVar
	)
	set /a sumresult+=!tempnum1!
)
:EndVar
goto:EOF
复制代码