Function get_demo

tests/get/src/main.rs:1–4

(a: &[i32; 5], i: usize)

fn get_demo(a: &[i32; 5], i: usize) -> Option<&i32> {
    assert!(i < a.len());
    a.get(i)
}

fn main() {
    let a = [1, 2, 3, 4, 5];