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?](http://stackoverflow.com/questions/8055371/how-to-run-two-commands-in-one-line-in-windows-cmd) — us2012, Sep 16 '13 at 10:55
Aren't you actually asking about passing parameters to an application through command line? — Dariusz, Sep 16 '13 at 10:57
us2012: ya similar to that. Thanks :) Dariusz not parameters but two separate commands using same shell. — Destructor, Sep 16 '13 at 17:20

score 1 · Accepted Answer · edited May 23 '17 at 10:25

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 '17 at 10:25

Community

answered Sep 16 '13 at 10:54

Arno

cool ! thanks ! and do you know how to avoid command prompt from popping up while using system() ? – Destructor Sep 16 '13 at 11:19
I've added information on how to resolve the newline issue, See my edit. – Arno Sep 16 '13 at 11:29
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 Sep 16 '13 at 11:34
Thanks a lot ! #ifdef _Win32 //Windows OS, use CreateProcess #else //Not windows This is correct ? – Destructor Sep 16 '13 at 12:26

score 0 · Answer 2 · answered Sep 16 '13 at 10:57

0

You can achieve this using & separator:

set VAR=Hello & set VAR2=BYE

answered Sep 16 '13 at 10:57

shofee

2 Answers2