Batch Processing tutorial

@ Echo off

Rem checks whether a file exists

If exist example.txt echo found it

The REM command combination is similar to the short path operation of Js.

Dir example.txt & Echo found it too

Rem Append content everywhere to files

ECHO not bad day> exmple.txt

The simplest combination of REM commands

Echo Hello & Echo world!

Rem, This is a comment, to make the Earth understand

Echo comments example

Rem | (the output of the previous command serves as the input of the next command) More one screen displays the following content: Enter 1 line, space 1 screen

: Help | more

: More longarticle.txt

: Type longarticle.txt

Rem | for short path operations, refer to JS

Dir setup _ *. exe | ECHO can see me

Dir Foo. TTT & dir foo.txt | ECHO can not see me 2

Dir Foo. TTT & dir foo.txt | ECHO can see me 2

Rem input redirection <> & <&

: More <longarticle.txt

Rem output redirection >>>

: ECHO has some good idea> haha.txt
: Echo come on> haha.txt

The REM call command calls the other batch from one batch and accepts the input parameters.

Call hi. Bat Sindy

: Hi. bat
: Echo hello, % 1

The REM choice command prompts the user to enter a letter to select it. The return code is 1234 ......

Choice/c abc/M apple, banana, coffee

If errorlevel 3 goto coffee
If errorlevel 2 goto banana
If errorlevel 1 goto Apple

: Apple
Echo you like apple
Goto end

: Banana
Echo you like banana
Goto end

: Apple
Echo you like coffee
Goto end

: End
Echo goodbye

Rem find command find string note that this string requires double quotation marks

Netstat-An> a.txt
Type. txt | find "5355" & Echo Yes, you found the string

Rem if command to determine input parameters

If "% 1" = "" Goto usage

If "% 1" = "/? "Goto usage

If "% 1" = "help" Goto usage

: If not "% 1" = "" Goto somejob

: Usage
Echo this is something about how to use bat

Rem checks whether a file exists

If exist *. jpg del *. jpg

: If not exist *. jpg mkdir PIC

: The DOS program has a return code after running). If the returned code matches the defined error code (the error code defined here is 1 ), then execute the corresponding operation (here the corresponding operation is pause & edit % 1. ASM part)

: MASM % 1.asm

: If not errorlevel 1 link % 1.obj

: Pause & edit % 1.asm

::------------------------

: MASM % 1.asm

: If exist % 1.obj link % 1.obj

: Else pause & edit % 1.asm

Rem if [not] errorlevel number do command

Rem if [not] string1 = string2 do command

Rem if [not] exist filename do command

 

Batch Processing tutorial