How do i make this work?

[drifting otter]

I have 2 Programs random_player.c and eval_player.c Both are Programs to Play Reversi. And i have this reversi_controller (its written in go) the controller takes inputs from both .c player programs and sends them to eachother. Its to Control the Game between both Bots. But how do i start the controller? i write this in the right dir:
./reversi_controller -directory=. -pause=-1ms -repeat=1 -show=1 -stderr=0 -timeout=0ms ./eval_player ./random_player
i got this from my teacher like that. it always says: "./reversi_controller is a directory" and nothing more. Does anyone know how to fix that? i started those reversi_controller_windows++ programs but they open an cmd and it instantly closes. I can provides some code, if needed.

[solid brook]

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[drifting otter]

!solved