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I want to declare an Array and want to initialize it like this (maybe it is not good in real development, but I just want to figure it out)
the key point is that: 1. h is immutable 2. assign(also initialize) h[0] h[1] and h[2] separately.
use std::thread;
use std::time::Duration;
use rand::Rng; // 0.6.5
fn main() {
loop {
let h: [u32; 3];
h[0] = rand::thread_rng().gen_range(1, 101);
h[1] = rand::thread_rng().gen_range(1, 101);
h[2] = rand::thread_rng().gen_range(1, 101);
println!("{:?}", h);
thread::sleep(Duration::from_secs(2));
}
}
but the compiler says that
error[E0381]: use of possibly uninitialized variable: `h`
--> src\main.rs:11:9
|
11 | h[0] = rand::thread_rng().gen_range(1, 101);
| ^^^^ use of possibly uninitialized `h`
error: aborting due to previous error
of course h is uninitialized here, so what could I do?
or it is impossible to do such a thing
