＿人人人人人＿ ＞　突然の死　＜ ￣Y^Y^Y^Y^Y￣

suddenly_death.rs

use std::env;
use std::process;

const HALF_WIDTH: f32 = 0.5_f32;
const FULL_WIDTH: f32 = 1_f32;

fn str_repeat(string: &str, count: i16) -> String {
    (0..count).map(|_| string).collect::<String>()
}

fn main() {
    let args: Vec<_> = env::args().collect();

    if args.len() < 2 {
        println!("Usage: {} \"突然の死\"", args[0]);
        process::exit(1);
    }

    let words = &args[1];
    let width = words.chars().fold(0_f32, |acc, c| {
        if c.len_utf8() < 3 { acc + HALF_WIDTH }
        else { acc + FULL_WIDTH }
    });
    let count = width.ceil() as i16;

    println!("＿人人{}＿\n＞　{}　＜\n￣Y{}￣",
        str_repeat("人", count),
        words,
        str_repeat("^Y", count)
    );
}