批处理文件游戏麻烦，缺少操作员错误

Question

我一直在研究批处理文件游戏一段时间，但我遇到了我正在制作的商店的麻烦。当我运行脚本并尝试在商店中购买某件商品时，它会让我“缺少操作员”，然后显示购买商品的消息，但不会将商品添加到玩家的库存中。继承人的代码。任何帮助深表感谢。

:w_shop 

title Nova: In the Weapon Shop 

:sword_screen 
cls 
echo. 
echo You have %money% gold. 
echo. 
echo What will you buy? 
echo 1) Wooden Sword: 500 gold 
echo You own %sword1% 
echo. 
echo 2) Stone Sword: 1000 gold 
echo You own %sword2% 
echo. 
echo 3) Iron Blade: 5000 gold 
echo You own %sword3% 
echo. 
echo 4) Mythril Sabre: 7500 gold 
echo You own %sword4% 
echo. 
echo 5) Mythril Longsword: 10000 gold 
echo You own %sword5% 
echo. 
echo 6) Next 
echo. 
echo 7) Leave Shop 
set/p sword_screen= 
if %sword_screen% LEQ 0 goto sword_screen 
if %sword_screen% GEQ 8 goto sword_screen 
if %sword_screen% EQU 1 goto buy_sword1 
if %sword_screen% EQU 2 goto buy_sword2 
if %sword_screen% EQU 3 goto buy_sword3 
if %sword_screen% EQU 4 goto buy_sword4 
if %sword_screen% EQU 5 goto buy_sword5 
if %sword_screen% EQU 6 goto gauntlet_screen 
if %sword_screen% EQU 7 goto main_menu 

:buy_sword1 

set price=500 
set att=100 
if %money% LSS %price% goto lack_funds 
set/a money=%money%-%price% 
set/a %sword1%=%sword1%+1 
echo. 
echo You bought a Wooden Sword. This weapon has %att% attack. 
pause>nul 
goto sword_screen 

:buy_sword2 

set price=1000 
set att=150 
if %money% LSS %price% goto lack_funds 
set /a money=%money%-%price% 
set /a %sword2%=%sword2%+1 
echo. 
echo You bought a Stone Sword. This weapon has %att% attack. 
pause>nul 
goto sword_screen 

:buy_sword3 

set price=5000 
set att=300 
if %money% LSS %price% goto lack_funds 
set /a money=%money%-%price% 
set /a %sword3%=%sword3%+1 
echo. 
echo You bought a Iron Blade. This weapon has %att% attack. 
pause>nul 
goto sword_screen 

:buy_sword4 

set price=7500 
set att=500 
if %money% LSS %price% goto lack_funds 
set /a money=%money%-%price% 
set /a %sword4%=%sword4%+1 
echo. 
echo You bought a Mythril Sabre. This weapon has %att% attack. 
pause>nul 
goto sword_screen 

:buy_sword5 

set /a price=10000 
set /a att=1000 
if %money% LSS %price% goto lack_funds 
set /a money=%money%-%price% 
set /a %sword5%=%sword5%+1 
echo. 
echo You bought a Mythril Longsword. This weapon has %att% attack. 
pause>nul 
goto sword_screen 

只是要清楚，剑变量和货币变量在代码中

Answer 1

早前因为你没有定义的钱，也没有剑变量线

if %money% LSS %price% goto lack_funds 
set/a %sword1%=%sword1%+1 

扩大到申报

if LSS 500 goto lack_funds 
set/a =+1 

这是错误的。这些都是常见的错误。改变这样的行：

if [%money%] LSS [%price%] goto lack_funds 
set/a sword1=0%sword1%+1 

注意，变量是用方括号包围所以即使变量是undefinde你会得到至少一个有效的行

注意，左PARAM在set-line不能有％-signs，right-param有一个额外的0，这样如果变量未定义，你将得到0 + 1，这是有效的

btw，代码中没有lack_funds标签片段，也我建议加入

echo off 
set money=5000 

在脚本的开头