Why is it that when I run:
for /r c:\exe %a in (*.exe) do echo %~na
it always says:
Syntax error
??
for /r c:\exe %a in (*.exe) do echo %~na
it always says:
Syntax error
??
China DOS Union
Union site: www.cn-dos.net Forum site: www.cn-dos.net/forum
DOS stands for freedom, openness and progress. Let us work hard, learn from the openness and GNU spirit of FreeDOS and Linux, and together build and grow a free GNU GPL world!
中国DOS联盟论坛 » DOS学习入门 & 精彩文章 （教学室） » [Help] Question for all the veterans! About the for command?
View 639 Replies 6
Original Poster
Posted 2003-07-21 00:00 · 中国 广东 肇庆 电信
高级用户
★★
Credits 578
Posts 135
Joined 2003-07-10 00:00
23-year member
UID 6709
Gender Male
Posts 135
Joined 2003-07-10 00:00
23-year member
UID 6709
Gender Male
Status Offline
Floor 2
Posted 2003-07-22 00:00 · 中国 广东 广州 增城区 电信
元老会员
★★★
Credits 1,468
Posts 407
Joined 2002-10-21 00:00
23-year member
UID 34
Gender Male
From 广州
Posts 407
Joined 2002-10-21 00:00
23-year member
UID 34
Gender Male
From 广州
Status Offline
for is an important internal command in DOS. Its usage format is like this:
FOR %C IN (item1......) DO command
Here is an example:
If we want to view the contents of three text files A, B, and C, we would generally enter it like this:
C:\>TYPE A
A
C:\>TYPE B
B
C:\>TYPE C
C
Another method is:
C:\>for %c in (a,b,c) do echo %c
(The result is as follows)
C:\>echo a
a
C:\>echo b
b
C:\>echo c
c
If you want to display files of the .txt, .doc, and .WPS types in the current directory respectively, you can enter it like this:
for %i in (×.txt,*.doc,*.wps) do dir %i
In a batch file, the loop variable needs 2 percent signs (%%C), while if executed directly on the command line, only one % is needed.
FOR %C IN (item1......) DO command
Here is an example:
If we want to view the contents of three text files A, B, and C, we would generally enter it like this:
C:\>TYPE A
A
C:\>TYPE B
B
C:\>TYPE C
C
Another method is:
C:\>for %c in (a,b,c) do echo %c
(The result is as follows)
C:\>echo a
a
C:\>echo b
b
C:\>echo c
c
If you want to display files of the .txt, .doc, and .WPS types in the current directory respectively, you can enter it like this:
for %i in (×.txt,*.doc,*.wps) do dir %i
In a batch file, the loop variable needs 2 percent signs (%%C), while if executed directly on the command line, only one % is needed.
欢迎大家观临我的个人主页：
http://dosdiy.bluepc.com.cn/
http://dosdiy.ys168.com/
EMAIL: lydong@china.com.cn lydong@yeah.net
----------------------------------------------
http://dosdiy.bluepc.com.cn/
http://dosdiy.ys168.com/
EMAIL: lydong@china.com.cn lydong@yeah.net
----------------------------------------------
Floor 3
Posted 2003-07-22 00:00 · 中国 广东 肇庆 电信
高级用户
★★
Credits 578
Posts 135
Joined 2003-07-10 00:00
23-year member
UID 6709
Gender Male
Posts 135
Joined 2003-07-10 00:00
23-year member
UID 6709
Gender Male
Status Offline
Thanks
Floor 4
Posted 2003-07-27 00:00 · 中国 江苏 南京 电信
初级用户
★
Credits 178
Posts 16
Joined 2003-06-20 00:00
23-year member
UID 5609
Gender Male
Posts 16
Joined 2003-06-20 00:00
23-year member
UID 5609
Gender Male
Status Offline
Really learned something
Floor 5
Posted 2003-07-27 00:00 · 中国 辽宁 沈阳 联通
初级用户
★
Credits 148
Posts 10
Joined 2003-07-16 00:00
23-year member
UID 7016
Gender Male
Posts 10
Joined 2003-07-16 00:00
23-year member
UID 7016
Gender Male
Status Offline
Sigh, do you have to learn programming before you can learn batch files?!
Floor 6
Posted 2003-07-27 00:00 · 中国 广东 深圳 龙岗区 电信
中级用户
★★
Credits 356
Posts 54
Joined 2003-04-15 00:00
23-year member
UID 1552
Gender Male
Posts 54
Joined 2003-04-15 00:00
23-year member
UID 1552
Gender Male
Status Offline
Support, it would be even better if it were more detailed!
Floor 7
Posted 2004-08-03 00:00 · 中国 上海 宝山区 电信
初级用户
★★
Credits 217
Posts 55
Joined 2004-08-02 00:00
22-year member
UID 29516
Gender Female
Posts 55
Joined 2004-08-02 00:00
22-year member
UID 29516
Gender Female
Status Offline
Right
Forum Jump: