c++ for usb interface

[yanio]

first and foremost idk anything relating c++ and usb i/o
i have this water level system proj where there will be 4 levels and 2 outputs to control.
how do i put these into codes for c++ using a usb port module?

wat i mean is the c program would act as the controller to accept the inputs from the levels and also send a corresponding out once the condition is triggered. any help?

idk how to get inputs from the usb port and send outputs there too

[Texan40]

I would think you need some API like libusb and specifics on what/when/how the data will be communicated via usb.

[IWishIKnew]

what i did on a backup program i wrote was have it place a file in the directory, and if it wasnt there, then the usb wasnt there iether. If the usb was, then it would back it up and remove the test file.

[chipp]

yeah, i thought so... it simply using FILE pointer to check and access the usb drive as the usb drive is actually a partition (virtual?) drive at the computer, so theoretically speaking, we could access the drive even though it wasn't an ordinary drive (which is built-in at the computer physical drive)

CMIIW