按照官网学rust,程序地址在这里,
程序内容也很简单,
rust
use 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 input your guess.");
let mut guess = String::new();
io::stdin()
.read_line(&mut guess)
.expect("Failed to read line");
println!("You guessed: {guess}");
}
然后,程序运行时报错:
use of undeclared crate or module `rand`
原因:
运行程序找不到库,或者叫依赖(rust里有crates, package, module,看字面理解吧)
解决办法:
在cargo.toml中dependencies添加一条:
rand="0.8.5" ,如下,
XML
[package]
name = "guessing_game"
version = "0.1.0"
edition = "2021"
# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
[dependencies]
rand="0.8.5"
这里0.8.5是指版本,跟你的rust的版本有关。
本文结束。