Ferrum Examples

Example programs written in the Ferrum programming language.

Ferrum has C syntax with compile-time memory safety — no garbage collector, no runtime overhead.

Programs

File	What it shows
hello.fe	Hello World — the simplest Ferrum program
counter.fe	While loop and integer arithmetic
factorial.fe	Recursive function, for loop
ownership.fe	new, move(), automatic free()
borrows.fe	Immutable & and mutable &mut borrows
unsafe_demo.fe	Raw pointers inside unsafe {} blocks

How to run

Build the compiler first

git clone https://github.com/Ferrum-Language/Ferrum.git
cd Ferrum
bash build.sh

Compile and run any example

./build/ferrumc hello.fe -o hello
./hello

See the generated LLVM IR

./build/ferrumc ownership.fe --emit-ir

Requirements

• g++ with C++20
• LLVM 18 (llvm-config, llc)
• gcc (for linking)

# Ubuntu / Debian
sudo apt install llvm-18 llvm-18-dev gcc g++ build-essential

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Ferrum-language Compiler v0.3 — Ferrum-Language