Execute a command and get both output and exit status in C++ (Windows & Linux)

Recently I had to parse some command line output inside a C++ program. Executing a command and getting just the exit status is easy using `std::system`, but also getting output is a bit harder and OS specific. By using `popen`, a POSIX `C` function we can get both the exit status as well as the output of a given command. On Windows I'm using `_popen`, so the code should be cross platform, except for the exit status on Windows is alway 0, that concept does not exist there. This article starts of...

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