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)

let mut input: Vec<String> = Vec::new();
let stdin = io::stdin();
let handle = stdin.lock();
for result in handle.lines() {
    match result {
        Ok(line) => input.push(line),
        Err(_) => break,
    }
}
print!("START\n{}\nFINISH", input.join("\n"));

User Input

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