Week 1 C

Watch the lecture

Video: https://www.youtube.com/watch?v=SlqjA04_dpk

Week 1 C

C. Source Code. Machine Code. Compiler. Correctness, Design, Style. Visual Studio Code. Syntax Highlighting. Escape Sequences. Header Files. Libraries. Manual Pages. Types. Conditionals. Variables. Loops. Linux. Graphical User Interface (GUI). Command-Line Interface (CLI). Constants. Comments. Pseudocode. Operators. Integer Overflow. Floating-Point Imprecision.

How to download source code into VS Code

  1. Log into cs50.dev.

  2. In your terminal window, type

    wget https://cdn.cs50.net/2025/fall/lectures/1/src1.zip

    followed by Enter in order to download a Zip file of lecture’s source code into your codespace.

  3. In your terminal window, type

    unzip src1.zip

    followed by Enter to unzip (i.e., decompress) that Zip file.

  4. In your terminal window, type

    cd src1

    followed by Enter in order to “change directory” into that src1 directory (i.e., folder).

  5. In your terminal window, type, e.g.,

    make hello0

    followed by Enter in order to compile, e.g., hello0.c (source code) into hello0 (machine code).

  6. In your terminal window, type, e.g.,

    ./hello0

    followed by Enter in order to run, e.g., hello0.