38 lines
1.1 KiB
Rust
38 lines
1.1 KiB
Rust
#![allow(dead_code, unused_imports)]
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use std::fs::File;
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use std::io::{self, BufRead};
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use std::path::Path;
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fn main() {
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let mut h = 0;
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let mut v = 0;
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let mut aim = 0;
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if let Ok(lines) = read_lines("directions.txt") {
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for line in lines {
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if let Ok(val) = line {
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println!("{}", val);
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//shadow assignment
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let val: Vec<&str> = val.split(' ').collect();
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let cmd = val[0];
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let n = val[1].parse::<u32>().unwrap();
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match cmd {
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"forward" => {
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h += n;
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v += n * aim
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}
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"down" => aim += n,
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"up" => aim -= n,
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_ => println!("not a command"),
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}
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}
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}
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}
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println!("h: {}, v: {}, final position: {}", h, v, h * v);
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}
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fn read_lines<P>(filename: P) -> io::Result<io::Lines<io::BufReader<File>>>
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where
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P: AsRef<Path>,
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{
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let file = File::open(filename)?;
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Ok(io::BufReader::new(file).lines())
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}
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