Fixed length records: Difference between revisions

<pre>

8.........7.........6.........5.........4.........3.........2.........1...1 eniL

2 eniL

3 eniL

4 eniL

6 eniL

7 eniL

............................................................8 enil detnednI

NIGRAM TR 9 eniL

</pre>

=={{header|Rust}}==

<lang rust>use std::io::prelude::*;

use std::io::{BufReader, BufWriter};

use std::fs::File;

fn reverse_file(input_filename: &str, output_filename: &str,

record_len: usize) -> std::io::Result<()> {

let mut input = BufReader::new(File::open(input_filename)?);

let mut output = BufWriter::new(File::create(output_filename)?);

let mut buffer = vec![0; record_len];

while input.read(&mut buffer)? == record_len {

buffer.reverse();

output.write_all(&buffer)?;

}

output.flush()?;

Ok(())

}

fn main() {

match reverse_file("infile.dat", "outfile.dat", 80) {

Ok(()) => {}

Err(error) => eprintln!("I/O error: {}", error)

}

}</lang>

{{out}}

After converting with dd: