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Completed Day 1

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A bit behind! :o
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Tyler Hallada 2018-12-12 00:04:49 -05:00
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/target
**/*.rs.bk

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[[package]]
name = "advent-of-code-2018"
version = "0.1.0"

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[package]
name = "advent-of-code-2018"
version = "0.1.0"
authors = ["Tyler Hallada <tyler@hallada.net>"]
edition = "2018"
[dependencies]

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use std::error::Error;
use std::fs::File;
use std::io::{BufRead, BufReader};
const INPUT: &str = "inputs/1.txt";
pub fn solve() -> Result<i32, Box<Error>> {
calculate_resulting_frequency(INPUT)
}
fn calculate_resulting_frequency(filename: &str) -> Result<i32, Box<Error>> {
let mut freq: i32 = 0;
let file = File::open(filename)?;
for line in BufReader::new(file).lines() {
let adjustment: i32 = line?.parse()?;
freq += adjustment;
}
Ok(freq)
}
#[cfg(test)]
mod tests {
use super::*;
const TEST_INPUT: &str = "inputs/1_test.txt";
#[test]
fn finds_resulting_frequency() {
assert_eq!(calculate_resulting_frequency(TEST_INPUT).unwrap(), 3);
}
}

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mod day1;
fn main() {
println!("Day 1:");
println!("{}", day1::solve().unwrap());
}