History of C Language
History of C Language
The C programming language has a rich history and is considered one of the most influential programming languages. Here’s a brief overview of its history:
Origins and Development
1960s: Predecessors
- ALGOL: Many programming languages of the 1960s, such as ALGOL, were influential in the development of C. ALGOL introduced structured programming and concepts that were foundational to many future languages.
- BCPL: Developed by Martin Richards in 1966, BCPL (Basic Combined Programming Language) was a simplified language meant for writing system software and compilers.
1970: B Language
- Ken Thompson: In 1969, Ken Thompson developed the B programming language based on BCPL while working at Bell Labs. B was used primarily on the DEC PDP-7 computer and was used for early versions of the UNIX operating system.
Creation of C
1972: Birth of C
- Dennis Ritchie: The C programming language was created by Dennis Ritchie at Bell Labs in 1972. C was designed as an improvement over B, incorporating features from both B and ALGOL.
- UNIX: C was initially used to re-implement the UNIX operating system. The efficiency and versatility of C contributed to the rapid development and adoption of UNIX.
Full ASCII Table
ASCII Value | Character | Description |
---|---|---|
0 | NUL | Null character |
1 | SOH | Start of Header |
2 | STX | Start of Text |
3 | ETX | End of Text |
4 | EOT | End of Transmission |
5 | ENQ | Enquiry |
6 | ACK | Acknowledge |
7 | BEL | Bell |
8 | BS | Backspace |
9 | TAB | Horizontal Tab |
10 | LF | Line Feed |
11 | VT | Vertical Tab |
12 | FF | Form Feed |
13 | CR | Carriage Return |
14 | SO | Shift Out |
15 | SI | Shift In |
16 | DLE | Data Link Escape |
17 | DC1 | Device Control 1 |
18 | DC2 | Device Control 2 |
19 | DC3 | Device Control 3 |
20 | DC4 | Device Control 4 |
21 | NAK | Negative Acknowledge |
22 | SYN | Synchronous Idle |
23 | ETB | End of Transmission Block |
24 | CAN | Cancel |
25 | EM | End of Medium |
26 | SUB | Substitute |
27 | ESC | Escape |
28 | FS | File Separator |
29 | GS | Group Separator |
30 | RS | Record Separator |
31 | US | Unit Separator |
32 | (space) | Space |
33 | ! | Exclamation mark |
34 | “ | Double quote |
35 | # | Hash |
36 | $ | Dollar sign |
37 | % | Percent |
38 | & | Ampersand |
39 | ‘ | Single quote |
40 | ( | Open parenthesis |
41 | ) | Close parenthesis |
42 | * | Asterisk |
43 | + | Plus |
44 | , | Comma |
45 | – | Hyphen |
46 | . | Period |
47 | / | Slash |
48 | 0 | Digit 0 |
49 | 1 | Digit 1 |
50 | 2 | Digit 2 |
51 | 3 | Digit 3 |
52 | 4 | Digit 4 |
53 | 5 | Digit 5 |
54 | 6 | Digit 6 |
55 | 7 | Digit 7 |
56 | 8 | Digit 8 |
57 | 9 | Digit 9 |
58 | : | Colon |
59 | ; | Semicolon |
60 | < | Less than |
61 | = | Equals |
62 | > | Greater than |
63 | ? | Question mark |
64 | @ | At sign |
65 | A | Uppercase A |
66 | B | Uppercase B |
67 | C | Uppercase C |
68 | D | Uppercase D |
69 | E | Uppercase E |
70 | F | Uppercase F |
71 | G | Uppercase G |
72 | H | Uppercase H |
73 | I | Uppercase I |
74 | J | Uppercase J |
75 | K | Uppercase K |
76 | L | Uppercase L |
77 | M | Uppercase M |
78 | N | Uppercase N |
79 | O | Uppercase O |
80 | P | Uppercase P |
81 | Q | Uppercase Q |
82 | R | Uppercase R |
83 | S | Uppercase S |
84 | T | Uppercase T |
85 | U | Uppercase U |
86 | V | Uppercase V |
87 | W | Uppercase W |
88 | X | Uppercase X |
89 | Y | Uppercase Y |
90 | Z | Uppercase Z |
91 | [ | Open square bracket |
92 | \ | Backslash |
93 | ] | Close square bracket |
94 | ^ | Caret |
95 | _ | Underscore |
96 | ` | Grave accent |
97 | a | Lowercase a |
98 | b | Lowercase b |
99 | c | Lowercase c |
100 | d | Lowercase d |
101 | e | Lowercase e |
102 | f | Lowercase f |
103 | g | Lowercase g |
104 | h | Lowercase h |
105 | i | Lowercase i |
106 | j | Lowercase j |
107 | k | Lowercase k |
108 | l | Lowercase l |
109 | m | Lowercase m |
110 | n | Lowercase n |
111 | o | Lowercase o |
112 | p | Lowercase p |
113 | q | Lowercase q |
114 | r | Lowercase r |
115 | s | Lowercase s |
116 | t | Lowercase t |
117 | u | Lowercase u |
118 | v | Lowercase v |
119 | w | Lowercase w |
120 | x | Lowercase x |
121 | y | Lowercase y |
122 | z | Lowercase z |
123 | { | Open curly brace |
124 | ||
125 | } | Close curly brace |
126 | ~ | Tilde |
127 | DEL | Delete |