Executing two commands at a time

[chitrevarun15]

Hello everyone,
Basically I am a Android Developer and have a basic knowledge on C++
I am making a program to execute logcat on Android phone but I am stuck at a point
Before proceeding further, here is my partial source code

cout<<"Executing logcat on your phone"<<endl;
cout<<"Press any key when you want to stop execution of logcat"<<endl;
system("adb\\adb logcat > ../log.txt");
getch();
system("adb\\adb kill-server");

So now problem is, Program goes on executing and saving logcat forever and never moves to getch(); command to stop it, so how should I stop the logcat?
Is one command to check if user press a key and an other to collect the logcat can be worked out?


I tried a second alternative separately that if we press ctrl+c then logcat stops but in compiled program if ctrl+c is pressed then the program too gets closed

Any help is appreciated

[Volatile Pulse]

logcat would need to have it's own way to be accessed by other programs. I don't know of the technical terms. There might be a possibility with threads. Start logcat on it's own thread, and possibly pause the thread when someone presses a button? I'm not 100% sure on threads and implementing them into programs, but might give you something to look into.

[chitrevarun15]

Can you give me very simple example on multithreaded C++ console application
Or is there any way to avoid termination of program with CTRL+C?

[Volatile Pulse]

I don't know of a way to avoid the CTRL + C exit code simply because it's a console feature. As for the multithreading, the is so many ways to do it. It's a new standard as of the C++11 standard, and if you're using an old compiler, it may not have it. Alternatives would be the boost libraries which work similarly to the standard ones.

[LEDelete]

Yes but he is using Code::Blocks and GNU GCC Compiler which is a quite old (compared to other) so I'm not sure that the 2011 standard is implanted in it...

However, Volatile Pulse learn me something because I never heard about a multithread option in C++, thanks !!!

[Volatile Pulse]

I personally use the Code::Blocks/GCC Compiler, and it supports many of the new C++11 features. As I said earlier, I have no implemented threads yet in any of my programs and am not 100% sure my version supports them, but I believe it does. I was also unaware of the compiler/IDE/OS the OP was using, so I didn't want to be too quick and assume.

As for references on the new standard, here is one at cppreference. The references here need updated badly.
http://en.cppreference.com/w/cpp/thread/thread

And here is a very simple explanation/walkthrough on starting with threads. I haven't found much on them yet since they're still fairly new and from what I've been told, a tutorial can't quite cover enough information to be effective.
http://www.informit.com/guides/content.aspx?g=cplusplus&seqNum=422

I would suggest at least seeing if the compiler supports threading by just including the <thread> header. You will receive an error if the library doesn't exist. (Don't forget you may need to include a compiler flag to enable the C++0x/C++11 features including std::thread)