Fibonacci Tutorial

This is the Catnip equivalent of the Assembly Fibonacci tutorial.
It prints Fibonacci values using the std library debug_num() helper (which uses int 0x90 internally).

#include "std"

#define COUNT, 12

main();

fun main() {
    let a:4 = 0;
    let b:4 = 1;
    let i:4 = 0;

    while (i:4 < ${COUNT}) {
        debug_num(b:4);

        let next:4 = a:4 + b:4;
        a:4 = b:4;
        b:4 = next:4;
        i:4 = i:4 + 1;
    }

    while (1) { }
}

How it works

1. a and b track consecutive Fibonacci numbers.
2. debug_num(b:4) calls the std helper that prints via debug interrupt 0x90.
3. next = a + b, then the pair advances (a = b, b = next).
4. The loop stops after COUNT values.

Build and run (Catnip + CatLauncher)

Because this tutorial uses debug interrupt 0x90, you must pass --test-ints.

nipcompile fibonacci.nip -o fibonacci.bin
catlaunch run --rom fibonacci.bin --test-ints

Expected style of output (decimal + hex per line):

1 0x00000001
1 0x00000001
2 0x00000002
3 0x00000003
5 0x00000005
...