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Puzzle 12: Amnesia

Explore Rust Puzzle 12 titled Amnesia by attempting to guess the output of a Rust program. This lesson helps learners understand important Rust concepts such as memory management and type conversion through practical problem solving.

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Guess the output

Before moving on to the explanation, try to guess the output of the following program. Good luck!

C++
fn main() {
    loop {
        let buffer = (0..1000).collect::<Vec<u32>>();
        std::mem::forget(buffer);
        print!(".");
    }
}

Quiz

Technical Quiz
1.

What is the output of the code above?

A.

The program loop runs forever since there’s no break keyword to stop it.

B.

The program prints a thousand dots (.) and exits.

C.

The program prints dots (.) for 10 seconds and then stops executing.

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