21-01-2012, 04:16 PM
DATA REPRESENTATION
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Information that a Computer is dealing with
Data
Numeric Data
Numbers( Integer, real)
Non-numeric Data
Letters, Symbols
Relationship between data elements
Data Structures
Linear Lists, Trees, Rings, etc
Program (Instruction)
Easiness of negative conversion
S + M > 1’s Complement > 2’s Complement
* Hardware
- S+M: Needs an adder and a subtractor for Addition
- 1’s and 2’s Complement: Need only an adder
* Speed of Arithmetic
2’s Complement > 1’s Complement(end-around C)
* Recognition of Zero
2’s Complement is fast
