Rust input/output

Documentation

std::fs

https://doc.rust-lang.org/std/fs/index.html

Stdin, Stdout, Stderr

println!("out");   // write to stdout
eprintln!("err");  // write to stderr

read from stdin (wait indefinitely if nothing is written)

use std::io;
use std::io::BufRead;

let stdin = io::stdin();
let handle = stdin.lock();
let lines: Vec<String> = handle
    .lines()
    .map(|res| res.unwrap_or_default())
    .collect();
print!("START\n{}\nFINISH\n", lines.join("\n"));

TODO:

read from stdin, checking if it's a tty or a pipe

User Input

let name = String::new();
io::stdin().read_line(&mut name);