How to create your argument (flag) to run the program in the terminal?

Question

linux

In short, now the quarantine and you need to do everything remotely and got the following task
- 1. Develop two applications for Linux, the first of which: system path specified by the PATH environment variable) - waits for the application to terminate and displays a termination message along with the return code PATH) - immediately continues execution (asynchronous launch)

Initially I tried to write via getopt but nothing came of it, maybe someone who understands this can give a hint (instruction) how to do it right?
Language C/C++

I will be very grateful.

Answer 1

all of the above can be done on the tower.
a small set of search queries will help you write the necessary lines.

Answer 2

Language C/C++

You have arguments in main as parameters.