63 lines
1.5 KiB
Rust
63 lines
1.5 KiB
Rust
// https://adventofcode.com/2024/day/3
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//
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// Run command: cargo run ./input.txt
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mod op;
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mod parser;
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mod tokenizer;
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use crate::op::Ops;
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use crate::parser::parse_tokens;
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use crate::tokenizer::{Token, tokenize};
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use core::panic;
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use std::env;
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use std::error::Error;
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use std::fs::File;
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use std::io::{BufReader, prelude::*};
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fn main() -> Result<(), Box<dyn Error>> {
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// Handle command input
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let args: Vec<String> = env::args().collect();
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if args.len() != 2 {
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panic!(
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"{} must be run with a single argument of files name!",
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&args[0]
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)
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}
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let input_file_string = &args[1];
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let input_buffer = BufReader::new(File::open(input_file_string)?);
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let mut tokens: Vec<Token> = Vec::new();
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for line in input_buffer.lines() {
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tokens.append(&mut tokenize(line? + "\n"));
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}
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//println!("{:?}", tokens);
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let muls = parse_tokens(&tokens);
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//println!("{:?}", muls);
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let mut accumulator_part1: i64 = 0;
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let mut accumulator_part2: i64 = 0;
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let mut enabled: bool = true;
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for op in muls {
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match op {
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Ops::Mul(mul_op) => {
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let value = mul_op.multiple::<i64>()?;
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accumulator_part1 += value;
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if enabled {
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accumulator_part2 += value;
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}
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}
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Ops::Do(_) => enabled = true,
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Ops::Dont(_) => enabled = false,
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}
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}
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println!("Answer part 1: {}", accumulator_part1);
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println!("Answer part 2: {}", accumulator_part2);
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Ok(())
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}
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