Cast operator
	Problem: given int i, access a particular byte										big-endian		little-endian
		int i = 0x1234abcd;								Address		Contents
		Is this big-endian or little-endian?  How can we tell?									1000	12	cd
	By definition, if we look at the bits in i, the leftmost bits are										1001	34	ab
		0001	0010	(big- or little-endian)							1002	ab	34
		Value is independent of byte order									1003	cd	12
											1004
											1005
											1006
											1007