@echo off&mode con cols=20 lines=29&color 2c
setlocal enabledelayedexpansion
title 弹球-zw19750516
set a=●&set "b= "
:begin
cls&set n=0
set /a lm=%random%%%19,lr=%random%%%2
if %lm% equ 0 (
set z=+
) else (
if %lm% equ 17 (
set z=-
) else (
if %lr% equ 0 (
set z=-
) else (
set z=+
)
)
)
:contin
set "kong="
set /a n+=1,lm%z%=1
for /l %%i in (1,1,%lm%) do set kong=!kong!%b%
set str%n%=%kong%%a%
if %n% equ 30 goto begin
if %lm% equ 0 set z=+
if %lm% equ 17 set z=-
set /p=!str%n%!<nul&ping /n 127.1>nul
for /l %%i in (1,1,20) do set /p= <nul
echo.
goto contin
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