mirror of https://github.com/KaiserY/trpl-zh-cn
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25 lines
578 B
25 lines
578 B
// 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 username_file_result = File::open("hello.txt");
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let mut username_file = match username_file_result {
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Ok(file) => file,
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Err(e) => return Err(e),
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};
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let mut username = String::new();
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match username_file.read_to_string(&mut username) {
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Ok(_) => Ok(username),
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Err(e) => Err(e),
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}
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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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