hanyeguxing

@echo off&setlocal enabledelayedexpansion
set n=0823&set m=0935
for /l %%a in (0,1,3) do set/a N_%%a=!n:~%%a,1!,M_%%a=!m:~%%a,1!
for /l %%a in (0,1,3) do for /l %%b in (0,1,3) do if !N_%%a!==!M_%%b! set/a b+=1
set N_&set M_&echo;%b%&pause
复制代码

楼主弄一大堆的 set /a 做什么呢？
for /l %%a in (0,1,3) do set/a N_%%a=!n:~%%a,1!,M_%%a=!m:~%%a,1! 分别将n、m截取分隔成4个数字
for /l %%a in (0,1,3) do for /l %%b in (0,1,3) do if !N_%%a!==!M_%%b! set/a b+=1 分别比较并计数
因为 for /l 迭代的少，所以 for /l %%a in (0,1,3) do 也可以写成 for %%a in (0,1,2,3) do
set/a N_%%a=!n:~%%a,1!,M_%%a=!m:~%%a,1! 也可以写成 set N_%%a=!n:~%%a,1!&set M_%%a=!m:~%%a,1!