For instructions run:

poker_calc 

or

poker_calc --help

You can easily give from 2-9 players. if no -b argument is present then Pre-Flop odds are calculated. Else if -b is 5 cards then it will simply give you who has the strongest hand (winner) else if -b is between 3-4 cards then flop odds and respecetivly turn odds will be calculated. After that you can either run arg mode version:

poker_calc -p 8s9s -p ThQd -b 8h9sJh --fast

Or you could try interactive mode (with limitations- 2 players only and board cards are mandatory)

poker_calc --interactive