Chapter 2 Guobao Jiang 11210240049@fudan.edu.cn
Chapter 2 Guobao Jiang 11210240049@fudan.edu.cn
Outline 2.1 Information Storage 2.2 Integer representations 2. 3 Integer Arithmetic 2.4 Floating Point 2.5 Summary
Outline • 2.1 Information Storage • 2.2 Integer Representations • 2.3 Integer Arithmetic • 2.4 Floating Point • 2.5 Summary 2
2.1 Information Storage Problem 2. 1(P29) A. Ox8F7A93 to binary 3 8 a 9 10001101101001011 D. Binary110101101101111100110to hexadecimal 001101010101101110100110 35 B 6
2.1 Information Storage • Problem 2.1 (P29) • A. 0x8F7A93 to binary3 8 F 7 A 9 3 1000 1111 0111 1010 1001 0011 • D. Binary 1101011011011111100110 to hexadecimal 0011 0101 1011 0111 1110 0110 3 5 B 7 E 6 3
Boolean algebras and rings Ring(Integer ring, Modular arithmetic Boolean algebra Note: the operations are different
Boolean Algebras and Rings • Ring (Integer ring, Modular arithmetic) • • Boolean algebra • • Note :the operations are different! 5
Logical Operations and Bit-level Operations p49 O: 1) nonzero argument as true, o as false 2) logical operators do not evaluate their second argument if what?
Logical Operations and Bit-level Operations P49 • LO: • 1) nonzero argument as TRUE, 0 as FALSE • 2) logical operators do not evaluate their second argument if what? 6
