Batch file 批处理-命令提示符不'；我不会做数学

我正在尝试制作一个批量RPG游戏，我正在制作一个战斗系统

代码如下：

:Explore
cls
if %lvl% EQU 1 %random% %%5 +1
if %lvl% EQU 2 %random% %%5 +1
if %lvl% EQU 3 %random% %%5 +1
if %lvl% EQU 4 %random% %%5 +1
if %lvl% EQU 5 %random% %%5 +1
if %random% EQU 1 goto Bear
if %random% EQU 2 goto Wolf
if %random% EQU 3 goto Foot Soldier
if %random% EQU 4 goto Cannibal
if %random% EQU 5 goto Tiger

::Enemies

:Bear
set enemyname=Bear
set enemylvl=%random% %%5 +1
set enemyhp=%random% %%50 +10
goto Battle

:Wolf
set enemyname=Wolf
set enemylvl=%random% %%5 +1
set enemyhp=%random% %%25 +5
goto Battle

:Foot Soldier
set enemyname=Foot Soldier
set enemylvl=%random% %%5 +1
set enemyhp=%random% %%25 +5
goto Battle

:Cannibal
set enemyname=Cannibal
set enemylvl=%random% %%5 +1
set enemyhp=%random% %%25 +5
goto Battle

:Tiger
set enemyname=Tiger
set enemylvl=%random% %%5 +1
set enemyhp=%random% %%30 +1
goto Battle

:Battle
cls
echo A level %enemylvl% %enemyname% (%enemyhp% HP) approaches! 
echo What will you do?
echo.
echo 1-Fight
echo 2-Run
echo.
set /p wwyd="Enter selection here:"
if %wwyd%==1 goto Fight
if %wwyd%==2 goto Run

当我运行程序时，它显示的不是敌人的变量（HP、name、lvl），而是未完成的数学运算。例如，它显示“等级31244/5+1熊（11071/50+10马力）接近。你会怎么做？”

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怎么了？请帮忙

set/？

声明，您需要

/a

执行算术

例如，您的产品线：

set enemylvl=%random% %%5 +1

应该是：

set /a enemylvl=%random% %%5 +1

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再次感谢Stephan！我将来可能会有更多的问题。除了Youtube之外，还有其他学习批处理的资源吗？Tim Hill的书，Windows NT Shell脚本。批处理语言自Windows NT以来没有太大变化，所以它仍然是一本适合您购买的好书。我将查看它。谢谢