ArdentMan

Call还是影响效率建议采用将变量转换成For变量的方法：

@Echo Off&SetLocal EnableDelayedExpansion
Set "Temp=abcdefghijklmnopqrstuvwxyz"
For /L %%i In (1,1,5) Do (
  Set /A a=!random!%%26,b=!random!%%3+1
  For %%j In (!a!) Do (
    For %%k In (!b!) Do Echo !Temp:~%%j,%%k!
  )
)
Pause>Nul
复制代码