询问变量是否等于批处理中的另一个变量时的语法错误 [英] Syntax error when asking if a variable equals another variable in batch

问题描述

这是我的代码:

if %magic%==%weakness% set /a damage=%random%*3/32767+12
if %magic==%resistance% set /a damage=%random%*3/32767+5
echo Your attack does %damage% damage.

运行此命令时，我不断收到语法错误.我在做什么错了?

I keep getting a syntax error when I run this. What am I doing wrong?

推荐答案

您应该始终在变量周围使用引号或使用延迟扩展，以避免在一个或两个变量为空时出现问题.

You should always use quotes around your variables or use delayed expansion, to avoid problems when one or both variables are empty.

顺便说一句.在第二行，您错过了百分之一

Btw. in the second line you missed one percent

if "%magic%"=="%weakness%" set /a damage=%random%*3/32767+12
if "%magic%"=="%resistance%" set /a damage=%random%*3/32767+5
echo Your attack does %damage% damage.

或扩展延迟

setlocal EnableDelayedExpansion
if !magic!==!weakness! set /a damage=%random%*3/32767+12
if !magic!==!resistance! set /a damage=%random%*3/32767+5
echo Your attack does !damage! damage.

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