Struct template_cp::iom::Scanner

pub struct Scanner<R> { /* private fields */ }

Scanner is a struct that can be used to parse input from a reader.

Examples

use cp_template::Scanner;
use std::io;

fn main() {
    let mut scan = Scanner::new(io::stdin().lock());
    let mut out = io::BufWriter::new(io::stdout().lock());
    solve(&mut scan, &mut out);
}

fn solve<R: io::BufRead, W: io::Write>(scan: &mut Scanner<R>, out: &mut W) {
    let n: usize = scan.tok();
    let v: Vec<i32> = (0..n).map(|_| scan.tok()).collect();
    writeln!(out, "{} {v:?}", n).ok();
}

use cp_template::Scanner;
use std::io;

fn main() {
    let mut scan = read_file("in.txt").unwrap();
    let mut out = writer_file("out.txt").unwrap();
    solve(&mut scan, &mut out);
}

fn solve<R: io::BufRead, W: io::Write>(scan: &mut Scanner<R>, out: &mut W) {
    let n: usize = scan.tok();
    let v: Vec<i32> = (0..n).map(|_| scan.tok()).collect();
    writeln!(out, "{} {v:?}", n).ok();
}

Implementations

impl<R: BufRead> Scanner<R>

pub fn new(reader: R) -> Self

Creates a new Scanner.

Examples

use cp_template::Scanner;

let mut scan = Scanner::new(std::io::stdin().lock());

use cp_template::Scanner;

let file = std::fs::File::open(filename)?;
Scanner::new(io::BufReader::new(file))

pub fn tok<T: FromStr>(&mut self) -> T

Reads a token.

Panics

Panics if the token can’t be parsed or the input is empty.

Examples

use cp_template::Scanner;

let mut scan = Scanner::new(std::io::stdin().lock());
let n: i32 = scan.tok();

use cp_template::Scanner;

let mut scan = Scanner::new(std::io::stdin().lock());
let n = scan.tok::<i32>();