China DOS Union

How to write this file?

Its purpose is to output on the same line without starting a new line.

For example:
echo a >t.txt

Then there is a line in t.txt showing a.

Now the problem is,
echo b >t.txt

b starts a new line in file t.txt. Then how to make it display immediately after a, that is:

ab

>>t.txt set/p=a<nul

>>t.txt set/p=b<nul

Originally posted by 9527 at 2006-12-23 17:15:
>>t.txt set/p=a<nul


>>t.txt set/p=b<nul

The result is not correct.

Yes, what is your running environment?

The meaning of 9527 is roughly that if you want to append "what", you can do >>t.txt set/p="what"<nul. Removing >>t.txt set/p=a<nul will only append "b".

Originally posted by vkill at 2006-12-23 17:36:
Right~ What is your running environment?

I am doing it under the CMD command line

I don't know why, after entering the loop body,

set /a a+=1

The syntax error is prompted!
May I ask why?
Thank you

It fails to run under pure DOS. Can you provide the successful code under pure DOS? Thanks here in advance.

Originally posted by scriptor at 2006-12-24 05:57:
How to write this file?

Its purpose is to output on the same line without starting a new line

For example:
echo a >t.txt
Then there is a line displaying a in t.txt

Now the problem is,
echo b >t.txt

b is in ...

If you use >, then a will be deleted and only b will be displayed. If you want to display ab, just use echo ab>t.txt directly?
The second floor is no problem.

The landlord's meaning may be
Originally there was a file

First line: a
Second line: (empty)

To recover and output the string "b" after a, you need to delete the second line.

That is, there was already a file or another piece of code that had generated that file.

I think after the building's echo a >t.txt, there is no second line (blank).
I want that after echo b >t.txt, there is no second line generated either, but instead, add b to the same line as a.