How do I execute a command and get the output of the command within C++ using POSIX?

Question

I am looking for a way to get the output of a command when it is run from within a C++ program. I have looked at using the system() function, but that will jus

Answer 1

Two possible approaches:

1. I don't think popen() is part of the C++ standard (it's part of POSIX from memory), but it's available on every UNIX I've worked with (and you seem to be targeting UNIX since your command is ./some_command).

2. On the off-chance that there is no popen(), you can use system("./some_command >/tmp/some_command.out");, then use the normal I/O functions to process the output file.