"C" Programming Language: Brian Kernighan - Computerphile

TL;DR

This video discusses the development of the C programming language, its predecessor B, and the process of creating the C programming book.

Transcript

There's a book just over your shoulder that's carefully been placed there, can you pick the book up and tell me about it? Right! Great book, you should buy the newer version of this. Brief commercial announcement yeah sure I think I mentioned at some point in our conversation the fact that the people working on MULTICS, well MULTICS was sort of the... Read More

Key Insights

• 🎅 The development of the C programming language was a result of the success and lessons learned from the MULTICS project.
• 🥘 High-level languages like C allowed for easier understanding and portability of operating systems.
• 🥺 A lack of adequate documentation and tutorials for early programming languages led to the need for comprehensive books like the one written by the author and Dennis Ritchie.

Questions & Answers

Q: Why did the developers of UNIX choose to write the operating system in a high-level language like C?

Writing the operating system in a high-level language made it easier for multiple people to understand and contributed to portability across different machine architectures.

Q: What was the main drawback of the language B, leading to the development of C?

B was limited in terms of power and performance, as it was an interpreter rather than a compiler and did not support the architecture of newer machines.

Q: How did the developers bootstrap the C compiler if it is written in C itself?

The bootstrapping process involved manually translating some initial C code into a form that could process more C code. This process allowed the compiler to be built.

Q: How did the idea of writing a C book come about?

The author, along with Dennis Ritchie, decided to write a book on C to provide comprehensive documentation and tutorial material for the language due to a perceived demand in the market.

Summary & Key Takeaways

• MULTICS was a collaborative project between MIT, Bell Labs, and General Electric, which aimed to provide a computing utility for programmers using timesharing.

• The development of the C programming language was influenced by the use of high-level languages in the creation of operating systems, with B being the initial attempt.

• Dennis Ritchie designed a version of B that was more powerful and reflective of newer machine architectures, leading to the creation of the C compiler and the rewriting of the UNIX operating system in C.