public/subjects/swapbits.md

## swapbits
### Instructions

Write a function that takes a byte, swaps its halves (like the example) and
returns the result.

Your function must be declared as follows:

func SwapBits(octet byte) byte {
     ...
}

Example:

  1 byte
_____________
 0100 | 0001
     \ /
     / \
 0001 | 0100