Week 2 Arrays

Watch the lecture

Video: https://www.youtube.com/watch?v=h5Gc1n8ZuU8

Week 2 Arrays

Preprocessing. Compiling. Assembling. Linking. Debugging. Arrays. Strings. Command-Line Arguments. Cryptography.

How to download source code into Visual Studio Code

  1. Log into cs50.dev.

  2. In your terminal window, type

    wget https://cdn.cs50.net/2025/fall/lectures/2/src2.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 src2.zip

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

  4. In your terminal window, type

    cd src2

    followed by Enter in order to “change directory” into that src2 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.