43 lines
1.3 KiB
Rust
43 lines
1.3 KiB
Rust
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use std::fs::File;
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use std::io::{self, prelude::*, BufReader};
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fn find_digit(line: String, match_array: &[&str]) -> u32 {
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println!("{}", line);
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for (i, item) in line.chars().enumerate(){
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if item.is_numeric() {
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return item as u32 - '0' as u32;
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}
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else {
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for count in 0..match_array.len() {
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if line[0..i+1].contains(match_array[count]) {
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return count as u32;
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}
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}
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}
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}
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return 0;
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}
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static texts: [&str; 10] = ["zero", "one", "two", "three", "four", "five", "six", "seven", "eight", "nine"];
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static rev_texts: [&str; 10] = ["orez", "eno", "owt", "eerht", "ruof", "evif", "xis", "neves", "thgie", "enin"];
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fn process_line(line: String) -> u32 {
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let first_digit: u32 = find_digit(line.clone(), &texts);
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let last_digit: u32 = find_digit(line.chars().rev().collect::<String>().clone(), &rev_texts);
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println!("{}{}", first_digit, last_digit);
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return first_digit*10+last_digit;
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}
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fn main() -> io::Result<()> {
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let mut sum: u32 = 0;
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let file = File::open("../input.txt")?;
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let reader = BufReader::new(file);
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for line in reader.lines() {
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sum = process_line(line?) + sum;
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}
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println!("{}", sum);
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Ok(())
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}
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