C语言40学时 CPU CPU contains arithmetic logic unit: +, x, / and Or control unit fetches instructions and data from memory executes instructions puts data back in memory (when we talk about a 600 MHz( mega hertz) Pentium Il, we are talking about how fast the CPU can do these things.) Brooks/Cole C Brooks/Cole, 2001 Thomson Learni© Brooks/Cole, 2001 C语言４０学时 CPU • CPU contains – arithmetic logic unit: +, -, *, /, and. Or – control unit: • fetches instructions and data from memory; • executes instructions • puts data back in memory • (when we talk about a 600 MHz( mega￾hertz) Pentium III, we are talking about how fast the CPU can do these things.)