[文本处理] 请教为何批处理设置的变量使用IF框起来后就不正确了？

diablozhao

两个批处理主要是下面【等号】内的区别

1.这是符合我预期结果的代码，等号内的结果正确显示。

@echo off
set egg=6
set C_PATH=c:\KL500\C
set D_PATH=d:\kl300\D
echo cpath=%C_PATH%
echo dpath=%D_PATH%
if "%egg%"=="6" CALL :DZPATH "%C_PATH%" "%D_PATH%"
echo =====================================
set aaa=%dzdk1%
echo aaa=%aaa%
set bbb=%dzdk2%
echo bbb=%bbb%
set CEP=%dzdk1%%dzp1%
set DGP=%dzdk2%%dzp2%
echo CEP=%CEP%
echo DGP=%DGP%
echo =====================================
pause

:END
goto:eof

:DZPATH
rem path1
set dzdk1=%~d1
set dzp1=%~p1
set dzfn1=%~n1
set dzfx1=%~x1
rem path2
set dzdk2=%~d2
set dzp2=%~p2
set dzfn2=%~n2
set dzfx2=%~x2
rem path3
set dzdk3=%~d3
set dzp3=%~p3
set dzfn3=%~n3
set dzfx3=%~x3
rem path4
set dzdk4=%~d4
set dzp4=%~p4
set dzfn4=%~n4
set dzfx4=%~x4
goto:eof
复制代码

显示的结果是
=====================================
aaa=c:
bbb=d:
CEP=c:\KL500\
DGP=d:\kl300\
=====================================


2.这个我多加了个 IF 把等号内的内容框起来后，echo显示的结果就不对了。
请教为什么会这样？是格式写错了吗？

@echo off
set egg=6
set C_PATH=c:\KL500\C
set D_PATH=d:\kl300\D
echo cpath=%C_PATH%
echo dpath=%D_PATH%
if "%egg%"=="6" CALL :DZPATH "%C_PATH%" "%D_PATH%"
echo =====================================
if "%egg%"=="6" (
set aaa=%dzdk1%
echo aaa=%aaa%
set bbb=%dzdk2%
echo bbb=%bbb%
set CEP=%dzdk1%%dzp1%
set DGP=%dzdk2%%dzp2%
echo CEP=%CEP%
echo DGP=%DGP%
)
echo =====================================

pause

:END
goto:eof

:DZPATH
rem path1
set dzdk1=%~d1
set dzp1=%~p1
set dzfn1=%~n1
set dzfx1=%~x1
rem path2
set dzdk2=%~d2
set dzp2=%~p2
set dzfn2=%~n2
set dzfx2=%~x2
rem path3
set dzdk3=%~d3
set dzp3=%~p3
set dzfn3=%~n3
set dzfx3=%~x3
rem path4
set dzdk4=%~d4
set dzp4=%~p4
set dzfn4=%~n4
set dzfx4=%~x4
goto:eof
复制代码

显示的结果是：
=====================================
aaa=
bbb=
CEP=
DGP=
=====================================

diablozhao

回复 3# Batcher


    谢谢！

Batcher

回复 2# diablozhao


是的，可以多研究一下：批处理中的变量延迟扩展、变量嵌套
http://bbs.bathome.net/thread-2899-1-1.html

diablozhao

原因找到了，要加延迟变量