China DOS Union

SET a=1
SET b=2
SET c=a+b

In BASIC, the value of C would be 3, but batch processing can't do that.

I've tried ASET, XSET, STRINGS and none worked (they only support direct numeric operations)

Is there any other small tool that can solve "arithmetic operations between variables"?

If it is the DOS mode of Windows 2000/xp/2003, you can use:
set /a c=a+b

As for the pure DOS environment, you can use Horst's varset.

Thanks, going home to try it out.
Also, CLIMBING? It's the moderator of Wuyou! Long time no see!

gmy, in fact, STRINGS can also be done, for example:

SET A=1
SET B=2
STRINGS C=ADD %A%,%B%

to Wengier

STRINGS C=ADD %A%,%B%

It doesn't seem to work. I tried. If it's:

STRINGS C=ADD 1,2

It's okay. STRINGS doesn't support variable forms (%X%)

### to Climbing

VARSET Success! Thank you! The specific steps are:

set a=1
set b=2
call var set c=%a%,%b%

Then press ENTER after SET
C=3

gmy, who said STRINGS doesn't support variable form? I did an experiment before replying, and it proved that it's absolutely feasible before posting it. In fact, there is no question of whether STRINGS supports environment variables at all, but it depends on whether DOS supports it, because after entering the environment variable, DOS automatically converts the environment variable into its actual value and hands it to the program for use, either because the usage method is wrong. Note: I tested it under the pure MS-DOS 7.10 command line.

STRINGS is what command? Forgive me for being ignorant, I'm seeing this command for the first time, and I've learned something new!

Is this command only usable under DOS 7.10? I didn't find this command in the DOS mode of 2003. Why does Microsoft keep changing things like this?

Also, I think varset is more universal because it can be used in any DOS environment.

In fact, both Strings and Varset are external tools, not built-in with DOS. It's just that Varset was written by Horst, while Strings was written by Dunglas and has more functions. Both can be downloaded in the "Script Tools" section of the website. Since the LZ mentioned Strings in the post, I'll explain that Strings can do it (Varset can certainly do it too).

Strings are indeed great things!!!