mirror of
https://github.com/KaiserY/trpl-zh-cn
synced 2025-05-01 10:49:12 +08:00
17 lines
357 B
Rust
17 lines
357 B
Rust
// ANCHOR: here
|
|
use std::fs::File;
|
|
use std::io::{self, Read};
|
|
|
|
fn read_username_from_file() -> Result<String, io::Error> {
|
|
let mut username = String::new();
|
|
|
|
File::open("hello.txt")?.read_to_string(&mut username)?;
|
|
|
|
Ok(username)
|
|
}
|
|
// ANCHOR_END: here
|
|
|
|
fn main() {
|
|
let username = read_username_from_file().expect("Unable to get username");
|
|
}
|