To resolve it, launch the Visual Studio Installer and apply all available updates. (on Windows) thread 'main' panicked at 'Unable to find libclang: "couldn\'t find any v alid shared libraries matching: 9/src/platform_impl/linux/wayland/event_loop/mod.rs", error: WaylandError(Connection(NoCompositor)) }) (thread main, at ports/servoshell/desktop/cli.rs:34) 0: servoshell::backtrace::print at something like this: NixOS If you are on NixOS, you might get errors about pkg-config or crown : thread 'main' panicked at 'called `Result::unwrap()` on an `Err` value: "Could not run `PKG_CONFIG_ALLO

std::io; use rand::Rng; fn main() { println!("Guess the number!"); let secret_number = rand::thread_rng().gen_range(1..=100); println!("The secret number is: {secret_number}"); println!("Please trait，它定义了随机数生成器应实现的 方法，想使用这些方法的话，此 trait 必须在作用域中。第十章会详细介绍 trait。 接下来，我们在中间还新增加了两行。第一行调用了 rand::thread_rng 函数提供实际使用的 随机数生成器：它位于当前执行线程的本地环境中，并从操作系统获取 seed。接着调用随机 数生成器的 gen_range 方法。这个方法由 use rand::Rng guessed: 60 Too big! Please input your guess. 59 You guessed: 59 You win! Please input your guess. quit thread 'main' panicked at src/main.rs:28:47: Please type a number!: ParseIntError { kind: InvalidDigit }