China DOS Union

Compare d:\123\1.txt and \\server\123\1.txt. If the contents are the same, run d:\123\1.exe; if different, run \\server\123\2.exe. If possible, please tell me how to implement it. Thanks

@echo off
fc d:\123\1.txt \\server\123\1.txt > nul
if errorlevel 1 goto _runserver
if errorlevel 0 goto _runlocal
goto _quit
:_runserver
\\server\123\2.exe
goto _quit
:_runlocal
d:\123\1.exe
:_quitIn the above example, fc is used to compare files. Of course, you can use tools like CRC or md5sum to calculate the checksum values of two files to compare whether the files are the same. Also, remind you to write a good post title.

Brother Climbing: I found that under Win98, the return value of FC is 0 whether the two files are the same or not, which is a wrong judgment, isn't it?

The narrow sense of batch processing refers to a command sequence composed of DOS internal commands (such as copy, dir) and batch processing commands such as for, goto. The broad sense of batch processing refers to calling multiple external files according to certain requirements, and as long as the operations supported by external commands are concerned, batch processing can be realized. In the above example, it is completely possible to write a program by yourself, return different values according to whether two files are the same or not, and then use if errorlevel to handle it.

Haha, batch processing also has narrow and broad senses. I always thought there were only simple and complex ones. crshen: Do you mean to write a more perfect FC? I support you! Shake hands first...

The following is a statement from JonePeng on 2005-1-29 22:46:53:
crshen: Do you mean to write a more complete FC?
I support you! Let's shake hands first...

I took some time today to write a small program specifically for comparing text files. The usage is:

fc.exe file1 file2 ; Compare file1 and file2 byte by byte

fc.exe file1 file2 /blank ; When comparing the two files, ignore all spaces, for example, "abcd " and "a bc d" are the same.

After comparison, return 1 indicating that the two files are the same, return 0 indicating differences, and return 2 indicating an error occurred during program operation.

There are test files inside. Open the attachment

Great! And it can compare files larger than 64K. I wonder which compiler was used?
P.S.: The last word in the returned message "Two files are NOT eaqule!" is incorrect; it should be "equal".

Thanks JonePeng, the errors have been corrected and re-uploaded. I used Turbo C 2.0 for compilation. I feel that the binary comparison function is generally not used in batch processing, so I didn't add it to reduce the program size. I wonder if the expert has any other suggestions?

Re crshen:
Just downloaded, not tested yet, let's give a few functional suggestions first, for reference only. Binary comparison is still widely applied in batch processing, such as comparing two disk image files, comparing the same pictures among multiple pictures. The following suggestions are for binary comparison.
1. Add comparison of multiple files, for example, compare all similar pictures among a large number of pictures;
2. Add file similarity index, for example, two files have an 80% similarity rate;
3. Add file update comparison, for example, which of the two WORD documents is more up-to-date;
4. Improve file comparison speed, select a non-byte-by-byte comparison algorithm, for example, generate MD5 respectively and then compare.
Wish you success!