dos之bat批处理文件语法介绍（DOS bat batch file syntax introduction）.doc

dos之bat批处理文件语法介绍（DOS bat batch file syntax introduction） First of all, the batch file is a text file, the file of each line is a DOS command (most of the time as if we perform at the DOS prompt like command line), you can use DOS Edit or Windows Notepad (Notepad) any text file editing tools to create and modify the batch file. Secondly, the batch file is a simple procedure, through a conditional statement (if) and flow control statements (goto) to control the operation of the order flow in a batch can also use the loop (for) to execute a command. Of course, the programming capabilities of batch files are very limited and very nonstandard compared to programming languages such as the C language. Batch program statements are the DOS commands of a line (both internal and external commands), and the ability to batch depends largely on the commands you use. Third, each written batch file is equivalent to an external command of the DOS. You can put its directory in your DOS search path (path) so that it can run anywhere. A good habit is to build a bat or batch directory on the hard disk (such as C:\BATCH), and then all you write a batch file in the directory, so long as the setting of c:\batch in path, you can run all your written batch procedure at any position. In fourth, DOS and Win9x/Me, C: under the root directory of the AUTOEXEC.BAT batch file is automatically run the batch file, every time the system will start automatically run the file, you can each time the system started to run a command into the file, such as setting the search path, the mouse driver and transferred to the disk cache. Setting system environment variables. Here is an example of a autoexec.bat running under Windows 98: @ECHO OFF PATH C:\WINDOWS; C:\WINDOWS\COMMAND; C:\UCDOS; C:\DOSTools;; C:\SYSTOOLS; C:\WINTOOLS; C:\BATCH LH SMARTDRV.EXE /X LH DOSKEY.COM /INSERT LH CTMOUSE.EXE SET TEMP=D:\TEMP SET TMP=D:\TEMP The role of batch processing Simply put, the function of batching is to execute multip