can someone help me to use barcode scanner mcr12 with usb cable?
Just type "mcr12 barcodescanner" into the Internet (aka Google) and you get everything needed in the first results.
Also this video.
Option 1: Connect the bar code scanner to a raspberry pi.
Option 2: Connect the bar code scanner to an Arduino USB Host shield.
https://www.circuitsathome.com/mcu/connecting-barcode-scanner-arduino-usb-host-shield/
There is no guarantee your scanner will work with the USB host shield so you might want to search the git repo issues for hints.