31 lines
727 B
Rust
31 lines
727 B
Rust
use std::error::Error;
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use std::fs::File;
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use std::io::BufReader;
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use std::io::prelude::*;
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fn main() -> std::io::Result<()> {
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let file = match File::open("input") {
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// The `description` method of `io::Error` returns a string that describes the error
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Err(why) => panic!("couldn't open input: {}", Error::description(&why)),
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Ok(file) => file,
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};
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let reader = BufReader::new(file);
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let lines = reader.lines();
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let mut total: i128 = 0;
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for result in lines {
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let l = result.unwrap();
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let offset:i128 = i128::from_str_radix(&l, 10).unwrap();
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println!("{} => {}", l, offset);
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total = total + offset;
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}
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println!("{}", total);
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Ok(())
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}
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