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37 lines
990 B
37 lines
990 B
use std::fs::File; |
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use std::io::BufRead; |
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use std::io::BufReader; |
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use clap::Arg; |
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use clap::Command; |
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fn main() { |
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let matches = Command::new("Day1").arg(Arg::new("filename")).get_matches(); |
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let filename = matches |
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.get_one::<String>("filename") |
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.expect("Need a filename"); |
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println!("Processing {}...", filename); |
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let file = File::open(filename).expect("Can't read file"); |
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let reader = BufReader::new(file); |
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let mut max_calories = 0; |
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let mut elf_calories = 0; |
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for line in reader.lines() { |
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let line = line.unwrap(); |
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let line = line.trim(); |
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// XXX I want to do this with an iterator! |
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if line.is_empty() { |
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if elf_calories > max_calories { |
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max_calories = elf_calories; |
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} |
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elf_calories = 0; |
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} else { |
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println!("Line: {}", line); |
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elf_calories += line.parse::<u32>().unwrap(); |
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} |
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} |
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println!("Max: {}", max_calories); |
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}
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