Calculating

[Larssie111]

How do you calculate in Dos
I want only + and -

[Carbon Dudeoxide]

Is this homework of some sort?

Hint: Set command.

[Larssie111]

Yes it is

[Carbon Dudeoxide]

We don't write other people's homework.

I already gave you the command you need.


Hint2: In Command Prompt, set /?

[Dias de verano]

By the way, set arithmetic is only possible in modern NT family command prompts, not "DOS".

[computeruler]

or in visual basic make a new consle application and type
dim number1, number2, + sum
number1 = a number
number2 = a number
sum = number1 + number2
consle.writeline "the sum of" & number1.tostring() & " and " & number2.tostring() &
"is " & sum.tostring())

[Frank]

I also have a calculating problem.
I would like to calculate how long some commands take.
For example:

@echo off
set old=%time%
echo %old%
rem some commands here
echo %old% %time%
set /A delay="%time% - %old%"
echo %delay%
pause

I get an error "Missing operator" then on the next line I get an 18.
Can anyone help with this?
Frank

[Carbon Dudeoxide]

Frank, I suggest you start a new topic. You will get more replies there.

Larssie111, he's got the answer to your question in his code. 

[Dias de verano]

Larssie111, he's got the answer to your question in his code. 

but %time% is not a number.

[Frank]

I thought that "batch" might work with "time" as a number like some other programs (eg. exel).

I started a new thread for my question (Calculating using time).
Frank