China DOS Union

　　I have been learning batch processing for some time. I feel that batch processing scripts have many things in common with many programming languages, especially in algorithms. The algorithms from other programming languages can also be applied to batch processing. Of course, it is only the similarity in algorithms, and the actual statements are different. 　^_^

　　In my personal opinion, batch processing scripts have the following aspects in common with other programming languages (compared with the familiar C language):
－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－　　 Variable assignment
　　In batch processing, you can use the set command to assign values, while in C language, it is assigned like "int a=1".
　　 Judgment statement
　　In batch processing, you can use if to judge, and similarly, in C language, you also use if.
　　 Loop statement
　　In batch processing scripts, you can use for to implement the loop function (of course, there are many other methods to implement loops in batch processing~), which is similar to the for in C.
　　 Input statement
　　In C language, you can use the "Scanf()" function to implement input operations, while in batch processing, you can use "set /p a=" instead.
　　 Output statement
　　In C language, you can use the "Printf()" function to implement output operations, and in batch processing, you can use a simple "echo" statement to complete it.
　　 Function
　　In C language, you can call functions to directly complete some tasks. I think that the combination of the "call" and "goto" commands in batch processing with labels is equivalent to a "function". You can first write the functions to be implemented in batch processing, then save the code in a.bat file or.cmd file, or directly put it in the batch processing script that calls it, and then call it with "call" or "goto", which is not equivalent to a function? =_=
　　 Parameter
　　In C language, there are parameters, and batch processing files and commands can also accept various parameters.
　　 Algorithm
　　Many algorithms are similar.
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　　The above are just my humble opinions. Due to experience and various reasons, there are inevitable omissions and errors. Everyone is welcome to discuss, criticize, and correct. If there are other common points that I haven't mentioned, everyone can post to discuss, and I will improve the content of the original text.

　　Maybe some friends think that one is a script and the other is a programming language, and the two cannot be compared. And the purpose of me writing this article is to make everyone have a new understanding of batch processing, that's all.


[ Last edited by lxmxn on 2006-11-16 at 03:34 AM ]

Function
In C language, you can call functions to directly complete some tasks. I think that the combination of the "call" and "goto" commands in batch processing with labels is equivalent to a "function". You can first write the functions to be implemented with batch processing, then save the code in a .bat file or .cmd file, or directly put it in the batch script that needs to call it, and then call it with "call" or "goto", isn't this equivalent to a function? =_=

Personally, I think this is just a sub, that is, a procedure. A function needs to return a value. And Goto can only exchange values through a public variable

They are all similar, just different commands

Not bad.....all pretty much the same

Not bad. Should write code to compare.

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I quite agree with the LZ's opinion that there are many commonalities among computer languages.

For the request from the 7th floor to write code as an example, here I respectively give an example in C language and batch processing, which can well illustrate the problem.

Title: There are numbers 1, 2, 3, 4. How many three-digit numbers that are distinct from each other and have no repeated digits can be formed? And what are they?

C language code:

#include "stdio.h"

#include "conio.h"

main()

{

  int i,j,k;

  printf("\n");

  for(i=1;i<5;i++) /*The following are three nested loops*/

    for(j=1;j<5;j++)

      for (k=1;k<5;k++)

      {

        if (i!=k&&i!=j&&j!=k) /*Ensure that the three digits i, j, k are all distinct from each other*/

        printf("%d,%d,%d\n",i,j,k);

      }

}

Batch processing code:

@echo off

cd.>test.txt

for /l %%i in (1 1 4) do (

   for /l %%j in (1 1 4) do (

       for /l %%k in (1 1 4) do (

             if not "%%i"=="%%j" if not "%%j"=="%%k" if not "%%i"=="%%k" echo %%i%%j%%k>>test.txt&set/a num+=1

       )

   )

)

echo A total of %num% three-digit numbers that are distinct from each other and have no repeated digits can be formed>>test.txt

start notepad.exe test.txt

It is not difficult to see from the above example that the problem-solving ideas are the same, and even the codes are very similar.

Can batch processing be used for operations?!

Originally posted by TLang at 2007-1-27 09:48:
Can batch processing perform calculations?!

set /a

Of course, with certain limitations

Originally posted by zh159 at 2007-1-27 09:52:

set /a

Of course, there are certain limitations

Yes, just basic operations

The IF statement is also relatively simple

......

In short, personally, I feel that in the WinXP SP2 era, although there have been great expansions to command-line commands and batch commands, they are still relatively simple and basic.

Originally posted by TLang at 2007-1-27 10:27:

Yes, just basic operations

The IF statement is also relatively simple

......

In short, personally, I feel that in the WinXP SP2 era, although there were great expansions to command-line commands and batch processing commands, they were still relatively simple...

　　Hehe, after all, it's a script. How can it have as many functions as high-level languages for you to use directly?

Cannons, missiles, submachine guns... In war, none can be missing. Each has its own strengths and will be put to use in every place in war where its strengths need to be exerted～:)

For guns, I might never touch or use one in my whole life (and of course can't buy one, haha). But for some people, losing it means losing precious lives～:)

Using the most suitable or suitable tools or scripts or a certain language in certain environments and making them give full play to their functions as much as possible is art～:)

(Personal rambling, just for fun, although still dreaming of having a gun～:)