woensdag 16 maart 2011

History of C

Hello guys! it's been a while since i last posted, but i've been a bit preoccupied with school related stuff. anyways, as i promised here is the remaining history of C programming, better late than never! :)

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Early developments

The initial development of C occurred at AT&T Bell Labs between 1969 and 1973. According to Ritchie, the most creative period occurred in 1972. It was named "C" because its features were derived from an earlier language called "B", which according to Ken Thompson was a stripped-down version of the BCPL programming language.

The origin of C is closely tied to the development of the Unix operating system, originally implemented in assembly language on a PDP-7 by Ritchie and Thompson, incorporating several ideas from colleagues. Eventually they decided to port the operating system to a PDP-11. B's inability to take advantage of some of the PDP-11's features, notably byte addressability, led to the development of an early version of C.

The original PDP-11 version of the Unix system was developed in assembly language. By 1973, with the addition of struct types, the C language had become powerful enough that most of the Unix kernel was rewritten in C. This was one of the first operating system kernels implemented in a language other than assembly. (Earlier instances include the Multics system (written in PL/I), and MCP (Master Control Program) for the Burroughs B5000 written in ALGOL in 1961.)

2 opmerkingen:

  1. I remember back in college I did so much C.
    Loved it, thanks for the history lesson!

  2. for something considered by the majority as bland, C has an interesting history. Thanks for sharing ;)