Handling command line flags in C/C++

Question

I am looking for a very simple explanation/tutorial on what flags are. I understand that flags work indicate a command what to do. For example:

rm -Rf test
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Answer 1

The easiest thing is to write your main() like so:

int main(int argc, char* argv[]) { ...

Then inside that main you decide what happens to the command line arguments or "flags". You find them in argv and their number is argc.