Variables in C & Co. also have a lifetime that they’re guaranteed to be available for, also called their “duration”. After their duration is up, you won’t be able to use the variable any more.

If you wish to calculate a 32-bit CRC, the variables INIT and CRC16 cannot be of type int. You can set the variables SHIFT_CRC, SHIFT_BYTE, and BYTE_SIZE to other values to accommodate various byte ...