converter string para i32 ferrugem
let my_u8: u8 = "42".parse::<u8>().unwrap();
let my_u32: u32 = "42".parse::<u32>().unwrap();
// or, to be safe, match the `Err`
match "foobar".parse::<i32>() {
Ok(n) => do_something_with(n),
Err(e) => weep_and_moan(),
}
Victorious Vole