By default, a batch file will display its command as it runs. The purpose of this first command which @echo off is to turn off this display. The ... ... <看更多>

@ 效果同 echo off ，只对当前行有效，于是用来取消打印 echo off 所在行。 对于 on|off 之外的argument，echo 将原样打印它。而linux shell 会去掉引号。 echo "hello ... ... <看更多>

Seeing echo off in a prompt will only tell you that a batch script is running, and that commands following the echo off will not be ... ... <看更多>

在这个命令执行过程中，DOS会将一个空字符串指定给参数%3。 IF-ERRORLEVEL. 建立TEST4.BAT，内容如下：. @ECHO OFF. XCOPY C:\AUTOEXEC.BAT D:\ IF ERRORLEVEL 1 ECHO ... ... <看更多>

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