For example, how do I check whether the value entered by the user is a valid expression?
For an IP address, how do I check whether it is less than 255?
For an IP address, how do I check whether it is less than 255?
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中国DOS联盟论坛 » DOS疑难解答 & 问题讨论 （解答室） » [Question] How to check numeric values under DOS
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Original Poster
Posted 2006-03-22 10:10 · 中国 广西 贺州 电信
Floor 2
Posted 2006-03-22 14:49 · 中国 北京 顺义区 联通
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You can set up a pattern like 192.168.0.XX, where XX represents a variable. You can define this when writing the batch file, and then use the IF statement to check it.
EQU - equal to
NEQ - not equal to
LSS - less than
LEQ - less than or equal to
GTR - greater than
GEQ - greater than or equal to
Use these values to check the range of your number. The error-handling ability of batch files isn't very strong to begin with, so it depends on how you write it and how well you can make the error handling.................
EQU - equal to
NEQ - not equal to
LSS - less than
LEQ - less than or equal to
GTR - greater than
GEQ - greater than or equal to
Use these values to check the range of your number. The error-handling ability of batch files isn't very strong to begin with, so it depends on how you write it and how well you can make the error handling.................
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Posted 2006-03-22 15:17 · 中国 北京 顺义区 联通
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Better to give an example
@echo off
:start
set /p oo=Enter your numeric:
if %oo% LSS 0 goto ooo
if %oo% GEQ 255 goto ooo
goto ii
oo
echo Sorry! The number you entered is incorrect!!!
goto :start
:ii
echo The IP address you set is :192.168.0.%oo%
@echo off
:start
set /p oo=Enter your numeric:
if %oo% LSS 0 goto ooo
if %oo% GEQ 255 goto ooo
goto ii
ooecho Sorry! The number you entered is incorrect!!!
goto :start
:ii
echo The IP address you set is :192.168.0.%oo%
Floor 4
Posted 2006-03-22 18:02 · 中国 广西 来宾 电信
Hehe, quite interesting. Thanks.
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