Team Badass

 Dennis M. Ritchie  1967 He became an employee at Bell Labs  Mid 1960s BCPL was developed by Martin Richards for the Multics Project  The B language was then developed by Ken Thompson for developing the UNIX system  1971 Ritchie extended the B language and this was the first incarnation of C  1973 UNIX was written in C

 Dennis Ritchie worked with the language B before developing C.  The “UNIX community” mainly used B for programming.  Most didn’t like B because of its restrictions.  “Its character handling mechanism is awkward, floating-point arithmetic is not handled well, and there is too much overhead dealing with pointers.”  The biggest problem with this language was its typeless nature.

 Dennis Ritchie wanted to improve B and so he started extending it. He had no intention of creating a new language at first.  One of the first things he did to extend the language was to add types to the language. The first extension of B included the two types Int, and Char.  This first extension had more “new” aspects to it other than the two variable types, but the typing was the most significant.  This extension of the language was called “New B”

 B was extended to such an extent that Ritchie finally decided that it was so different from B that it could now be considered a new language.  This new language was called C because it was the next letter in the alphabet after B.  There were 7 different variable types included in the C language by the time the first version released.  C is considered as a very portable language because it is easy to write compilers for the language for different systems.

 In 1973 the UNIX kernel was rewritten in C by Dennis Ritchie.  When this happened, popularity for UNIX skyrocketed.  C made the UNIX system portable with most universities at the time because of C’s portability.  C gained a huge amount of popularity due to UNIX being written in the language.  It was so popular that there was a compiler for nearly every system available at the time.

 Programmer Oriented  Flexible  Portable  Efficiency

C provides three ways to manage memory  Static memory allocation allocated at compile time before program is executed  Automatic memory allocation automatically allocates and de-allocates  Dynamic memory allocation uses blocks of memory to be used at run- time and released for reuse

 C was created because of the previous problems with the prior language B  Not only was there problems with the language itself, the compiler made it yield programs slower than assembly language  This led to the development of C which made for a more powerful, faster, and effective language  The C language and compiler allowed UNIX to be created which allowed multi-tasking and multi-user

 Smaller package  Faster run-time  Its ability to communicate with assembly and communicate directly with controllers, processors and other devices.  High performance  Highly adaptable

 doesn’t have good type safety, which is the extent at which a program discourages typos.  Doesn’t have the versatility of its cousins.  Needs a C compiler  Requires more work in coding than other languages.

 Unix is an operating system  Multitasking was introduced  Portability  Customizable  Revolutionized computer programming

 Popular operating system  Based off of UNIX  Open source  Used heavily for programming  Many servers are ran by Linux

 Extremely popular at the time and still is now  Also known as the “Doom engine”  Later changed language to C++ for stronger programming  Created games that revolutionized computer gaming forever.  For example games such as…

 Created by the company id Software  One of the first computer games that involved 3D graphics  Revolutionized first person shooters  Very memorable game

 Another series created by id Software  Very similar game to Doom  Was not as popular as Doom or Wolfenstein 3D

 id-tech 1 upgraded to id-tech 2 and it was called the “Quake Engine”  First person shooters are based off of this very game.  TF2, Left 4 Dead, Counter Strike.

 Allows recreation  Games are called “ROMs”  Currently written in C++, but was developed in C  Able to play any type of arcade game on a computer