mirror of https://github.com/rust-lang/book
17 lines
357 B
Rust
17 lines
357 B
Rust
// ANCHOR: here
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use std::fs::File;
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use std::io::{self, Read};
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fn read_username_from_file() -> Result<String, io::Error> {
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let mut username = String::new();
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File::open("hello.txt")?.read_to_string(&mut username)?;
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Ok(username)
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}
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// ANCHOR_END: here
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fn main() {
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let username = read_username_from_file().expect("Unable to get username");
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}
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