How can I run multiple commands at once from windows command line using c++ / c?

Question

how can I run multiple commands at once from windows command line? i want to set a couple of env variables and use them in the c++ program. Like:

set VAR=Hello and set VAR2=BYE

and same program should do:

echo %VAR% and echo %VAR2%

and the output should be:

Hello BYE

How to achieve this in c/c++ ? any way to do this using system() function ?

possible duplicate of How to run two commands in one line in Windows CMD? — us2012
– us2012, Commented Sep 16, 2013 at 10:55
Aren't you actually asking about passing parameters to an application through command line? — Dariusz
– Dariusz, Commented Sep 16, 2013 at 10:57
us2012: ya similar to that. Thanks :) Dariusz not parameters but two separate commands using same shell. — Destructor
– Destructor, Commented Sep 16, 2013 at 17:20

Community · Accepted Answer · 2017-05-23 10:25:35Z

1

You may execute a number of shell commands with the & seperator:

echo %VAR% & echo %VAR2%

See this SO answer to get more details.

Edit:

Unfortunately this will put the output seperated in two lines.

Hello

BYE

However, there is a solution for that too:

SET /P Var=%VAR%<NUL & echo %VAR2%

will output

Hello BYE

Edit 2:

Do not use system(), better use the CreateProcess function which allows you to set creation flags like CREATE_NO_WINDOW.

edited May 23, 2017 at 10:25

CommunityBot

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answered Sep 16, 2013 at 10:54

Arno

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4 Comments

Destructor Over a year ago

cool ! thanks ! and do you know how to avoid command prompt from popping up while using system() ?

Arno Over a year ago

I've added information on how to resolve the newline issue, See my edit.

Destructor Over a year ago

but still the command prompt window pops up na? how to avoid it? i want the output to be read just by my program, console should not appear . anyway to do this?

Destructor Over a year ago

Thanks a lot ! #ifdef _Win32 //Windows OS, use CreateProcess #else //Not windows This is correct ?

shofee · Accepted Answer · 2013-09-16 10:57:20Z

0

You can achieve this using & separator:

set VAR=Hello & set VAR2=BYE

answered Sep 16, 2013 at 10:57

shofee

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