31 lines
947 B
Rust
31 lines
947 B
Rust
use std::io::{BufRead, BufReader};
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use std::fs::File;
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fn main (){
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// let filename = "./input_example.txt";
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let filename = "./input.txt";
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let file = BufReader::new(File::open(filename).expect("Unable to open file"));
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let mut accum: u32 = 0;
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for line in file.lines() {
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let mut first_num: char = 'z';
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let mut last_num: char = 'z';
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// println!("{}", line.unwrap());
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for c in line.unwrap().to_string().chars() {
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if '0' <= c && c <= '9' {
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if first_num == 'z' {
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first_num = c;
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}
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last_num = c;
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}
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}
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let mut line_num = String::from(first_num);
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line_num.push(last_num);
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// println!("first: {}, last: {}", first_num, last_num);
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// println!("line_num: {}", line_num);
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accum += line_num.parse::<u32>().unwrap();
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}
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println!("Total lines are: {}", accum);
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}
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