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Exercise Two: Uploading an ASCII file to UHUNIX

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Exercise Two: Uploading an ASCII file to UHUNIX Part 3: ASCII donna Bair-Mundy What is an ASCII file? What is an ASCII file (cont'd) Data representation ASCII Each ... – PowerPoint PPT presentation

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Title: Exercise Two: Uploading an ASCII file to UHUNIX


1
Exercise Two Uploading an ASCII file to UHUNIX
  • Part 3 ASCII

donna Bair-Mundy
2
What is an ASCII file?
Language of diplomacy French
3
What is an ASCII file (cont'd)
Word Perfect
Multi Mate
Wordstar
Microsoft Word
A 01000001 B 01000010 C 01000011 D 01000100 E 0100
0101 F 01000110 G 01000111 H 01001000
Standard code American Standard Code for
Information Interchange (ASCII)
4
Data representation
Bit (binary digit) - the smallest unit of
data handled by a computer consists of a single
"on" or "off" digital value (0 or 1)
Byte - a group of 8 bits used to represent
a single character (number, letter, punctuation
mark, etc.)
5
ASCII
Standardized coding system for representing
textual data
  • Each character is stored or transmitted in one
    byte

Originally a seven-bit code now expanded to
eight bits
Allows exchange of information between
applications, computers, devices
Used on personal computers (EBCDIC for mainframes)
6
Sample ASCII codes
  • 007 (beep)
  • 010 (line feed)
  • 013 (carriage return)
  • 032 (space)
  • 033 !
  • 034 "
  • 035
  • 036
  • 037
  • 038
  • 039 '
  • 040 (

048 0 049 1 050 2 065 A 066 B 067 C 097 a 098
b 099 c 128 Ç 129 ü 130 é
Alt
224 ?
Alt
234 ?
7
ASCII coding
A 65
0
1
1
0
0
0
0
0
(64)
(1)
8
ASCII file
  • Also called "text" file

Text plus punctuation encoded in ASCII
No proprietary formatting codes
ASCII files with HTML tags used in creating Web
pages
Proceed to Part 4
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