📄 cmdbat.mht
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lang=3DEN-US> <br>
</span>语法<span lang=3DEN-US> <br>
echo [{on|off}] [message] <br>
Sample</span>：<span lang=3DEN-US>@echo off / echo hello world <br>
</span>在实际应用中我们=
250;把这条命令和重定向=
;符号（也称为管道符&#=
21495;，一般用<span
lang=3DEN-US>> >> ^</span>）结合来实=
现输入一些命令到特=
3450;格式的文件中<span
lang=3DEN-US>.</span>这将在以后的ߴ=
3;子中体现出来。<span
lang=3DEN-US>2.@ </span>命令<span lang=3DEN-US> <br>
</span>表示不显示<span lang=3DEN-US>@</span>&=
#21518;面的命令，在入侵$=
807;程中（例如使用批处=
;理来格式化敌人的硬&#=
30424;）自然不能让对方İ=
75;到你使用的命令啦。=
<span
lang=3DEN-US> <br>
Sample</span>：<span lang=3DEN-US>@echo off <br>
@echo Now initializing the program,please wait a minite... <br>
@format X: /q/u/autoset (format </span>这个命令=
159;不可以使用<span
lang=3DEN-US>/y</span>这个参数的，Ö=
87;喜的是微软留了个<span
lang=3DEN-US>autoset</span>这个参数给我=
们，效果和<span
lang=3DEN-US>/y</span>是一样的。<span lang=3D=
EN-US>)3.Goto
</span>命令<span lang=3DEN-US> <br>
</span>指定跳转到标签，=
214;到标签后，程序将处=
;理从下一行开始的命&#=
20196;。<span
lang=3DEN-US> <br>
</span>语法：<span lang=3DEN-US>goto label </span>（=
;<span
lang=3DEN-US>label</span>是参数，指定&#=
25152;要转向的批处理程ò=
07;中的行。）<span
lang=3DEN-US> <br>
Sample</span>：<span lang=3DEN-US> <br>
if {%1}=3D=3D{} goto noparms <br>
if {%2}=3D=3D{} goto noparms</span>（如果这里=
的<span
lang=3DEN-US>if</span>、<span lang=3DEN-US>%1</span>、<span lan=
g=3DEN-US>%2</span>你不明白的话，=
先跳过去，后面会有=
5814;细的解释。）<span
lang=3DEN-US> <br>
@Rem check parameters if null show usage <br>
:noparms <br>
echo Usage: monitor.bat ServerIP PortNumber <br>
goto end <br>
</span>标签的名字可以随=
415;起，但是最好是有意=
;义的字母啦，字母前&#=
21152;个：用来表示这个é=
83;母是标签，<span
lang=3DEN-US>goto</span>命令就是根据=
6825;个：来寻找下一步ั=
9;到到那里。最好有一&=
#20123;说明这样你别人看$=
215;来才会理解你的意图=
;啊。<span
lang=3DEN-US>4.Rem </span>命令<span lang=3DEN-US> <br>
</span>注释命令，在<span lang=3DEN-US>C=
</span>语言中相当与<span
lang=3DEN-US>/*--------*/,</span>它并不会被&#=
25191;行，只是起一个注ŵ=
22;的作用，便于别人阅=
读和你自己日后修改=
2290;<span
lang=3DEN-US> <br>
Rem Message <br>
Sample</span>：<span lang=3DEN-US>@Rem Here is the description.5.Paus=
e </span>命令<span
lang=3DEN-US> <br>
</span>运行<span lang=3DEN-US> Pause </span>命令=
6102;，将显示下面的消ত=
7;：<span
lang=3DEN-US> <br>
Press any key to continue . . . <br>
Sample</span>：<span lang=3DEN-US> <br>
@echo off <br>
:begin <br>
copy a:*.* d</span>：<span lang=3DEN-US>\back <br>
echo Please put a new disk into driver A <br>
pause <br>
goto begin <br>
</span>在这个例子中，驱=
160;器<span
lang=3DEN-US> A </span>中磁盘上的所=
377;文件均复制到<span
lang=3DEN-US>d:\back</span>中。显示的注=
释提示您将另一张磁=
0424;放入驱动器<span
lang=3DEN-US> A </span>时，<span lang=3DEN-US>pause </span>=
629;令会使程序挂起，以=
;便您更换磁盘，然后&#=
25353;任意键继续处理。<span
lang=3DEN-US>6.Call </span>命令<span lang=3DEN-US> <br>
</span>从一个批处理程序#=
843;用另一个批处理程序=
;，并且不终止父批处&#=
29702;程序。<span
lang=3DEN-US>call </span>命令接受用作&#=
35843;用目标的标签。如ĉ=
24;在脚本或批处理文件=
外使用<span
lang=3DEN-US> Call</span>，它将不会在&#=
21629;令行起作用。<span
lang=3DEN-US> <br>
</span>语法<span lang=3DEN-US> <br>
call [[Drive:][Path] FileName [BatchParameters]] [:label [arguments]] <br>
</span>参数<span lang=3DEN-US> <br>
[Drive:}[Path] FileName <br>
</span>指定要调用的批处=
702;程序的位置和名称。=
;<span
lang=3DEN-US>filename </span>参数必须具੍=
7;<span
lang=3DEN-US> .bat </span>或<span lang=3DEN-US> .cmd </span>扩&=
#23637;名。<span
lang=3DEN-US>7.start </span>命令<span lang=3DEN-US> <br>
</span>调用外部程序，所=
377;的<span
lang=3DEN-US>DOS</span>命令和命令行=
243;序都可以由<span
lang=3DEN-US>start</span>命令来调用。<s=
pan
lang=3DEN-US> <br>
</span>入侵常用参数：<span
lang=3DEN-US> <br>
MIN </span>开始时窗口最小化=
<span
lang=3DEN-US> <br>
SEPARATE </span>在分开的空间内=
4320;始<span
lang=3DEN-US> 16 </span>位<span lang=3DEN-US> Windows </span>程=
序<span
lang=3DEN-US> <br>
HIGH </span>在<span lang=3DEN-US> HIGH </span>优先级=
;类别开始应用程序<span
lang=3DEN-US> <br>
REALTIME </span>在<span lang=3DEN-US> REALTIME </span>优先=
;级类别开始应用程序<s=
pan
lang=3DEN-US> <br>
WAIT </span>启动应用程序并等=
;候它结束<span
lang=3DEN-US> <br>
parameters </span>这些为传送到命&=
#20196;<span
lang=3DEN-US>/</span>程序的参数<span lang=3DE=
N-US> <br>
</span>执行的应用程序是<span
lang=3DEN-US> 32-</span>位<span lang=3DEN-US> GUI </span>应=
992;程序时，<span
lang=3DEN-US>CMD.EXE </span>不等应用程序=
;终止就返回命令提示&#=
12290;如果在命令脚本内û=
91;行，该新行为则不会=
发生。<span
lang=3DEN-US> <br>
8.choice </span>命令<span lang=3DEN-US> <br>
choice </span>使用此命令可以ť=
53;用户输入一个字符，=
从而运行不同的命令=
2290;使用时应该加<span
lang=3DEN-US>/c:</span>参数，<span lang=3DEN-US>c:</span>=
后应写提示可输入的=
3383;符，之间无空格。द=
7;的返回码为<span
lang=3DEN-US>1234…… <br>
</span>如<span lang=3DEN-US>: choice /c:dme defrag,mem,end <br>
</span>将显示<span lang=3DEN-US> <br>
defrag,mem,end[D,M,E]? <br>
Sample</span>：<span lang=3DEN-US> <br>
Sample.bat</span>的内容如下<span lang=3DEN-US=
>: <br>
@echo off <br>
choice /c:dme defrag,mem,end <br>
if errorlevel 3 goto defrag </span>（应先判断=
数值最高的错误码）<sp=
an
lang=3DEN-US> <br>
if errorlevel 2 goto mem <br>
if errotlevel 1 goto end:defrag <br>
c:\dos\defrag <br>
goto end <br>
:mem <br>
mem <br>
goto end <br>
:end <br>
echo good bye <br>
</span>此文件运行后，将=
174;示<span
lang=3DEN-US> defrag,mem,end[D,M,E]? </span>用户可选=
;择<span
lang=3DEN-US>d m e </span>，然后<span lang=3DEN-US>if</sp=
an>语句将作出判断，<span
lang=3DEN-US>d</span>表示执行标号ߒ=
6;<span
lang=3DEN-US>defrag</span>的程序段，<span
lang=3DEN-US>m</span>表示执行标号ߒ=
6;<span
lang=3DEN-US>mem</span>的程序段，<span lang=
=3DEN-US>e</span>表示执行标号为<s=
pan
lang=3DEN-US>end</span>的程序段，每=
010;程序段最后都以<span
lang=3DEN-US>goto end</span>将程序跳到<span
lang=3DEN-US>end</span>标号处，然后=
243;序将显示<span
lang=3DEN-US>good bye</span>，文件结束。=
;<span
lang=3DEN-US>9.If </span>命令<span lang=3DEN-US>if </span>ŝ=
20;示将判断是否符合规=
定的条件，从而决定=
5191;行不同的命令。
有三种格式<span lang=3DEN-US>: <br>
1</span>、<span lang=3DEN-US>if "</span>参数<span
lang=3DEN-US>" =3D=3D "</span>字符串<span lang=
=3DEN-US>"
</span>　待执行的命令<span
lang=3DEN-US> <br>
</span>参数如果等于指定=
340;字符串，则条件成立=
;，运行命令，否则运&#=
34892;下一句。<span
lang=3DEN-US>(</span>注意是两个等ࡥ=
5;）<span
lang=3DEN-US> <br>
</span>如<span lang=3DEN-US>if "%1"=3D=3D"a" form=
at a: <br>
if {%1}=3D=3D{} goto noparms <br>
if {%2}=3D=3D{} goto noparms2</span>、<span lang=3DEN-US>if exist </s=
pan>文件名　
待执行的命令<span lang=3DEN-US> <br>
</span>如果有指定的文件A=
292;则条件成立，运行命=
;令，否则运行下一句&#=
12290;<span
lang=3DEN-US> <br>
</span>如<span lang=3DEN-US>if exist config.sys edit config.sys3</spa=
n>、<span
lang=3DEN-US>if errorlevel / if not errorlevel </span>数字z=
88; 待执行的命令<span
lang=3DEN-US> <br>
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