CHAPTER 15BIT FIDDLING
You will learn about the following in this chapter:
~ & |^
&= |= ^= >>= <<=
• Binary, octal, and hexadecimal number notations (a review)
• Two C facilities for handling the individual bits in a value: bitwise operators and bit fields
With C, you can manipulate the individual bits in a variable. Perhaps you are wondering why anyone would want to. Be assured that sometimes this ability is necessary, or at least useful. For example, a hardware device is often controlled by sending it a byte or two in which each bit has a particular meaning. Also, operating system information about files is often stored by using particular bits to indicate particular items. Many compression and encryption operations manipulate ...