@echo off&setlocal enabledelayedexpansion
set "num=5"
:begin
set /a num-=1
for /l %%i in (0,1,%num%) do (
set /a a=!random!%%20
if defined _!a! set /a num+=1&goto begin
set /p=!a! <nul&set "_!a!=!a!"&goto begin
)
pause>nul
代码如上，希望能一步一步讲解。先谢谢了

不用翻了吧。。。

@echo off&setlocal enabledelayedexpansion
set "num=5"
:begin
set /a num-=1
for /l %%i in (0,1,%num%) do (
set /a a=!random!%%20
if defined _!a! set /a num+=1&goto begin
set /p=!a! <nul&set "_!a!=!a!"&goto begin
)
pause>nul
代码如上，希望能一步一步讲解。[乖] 先谢谢了