突然の死

suddenize

#!/usr/bin/env bash

function suddenize() {
    typeset text hit length i header footer
    text=$1
    hit=0
    for i in $( seq 1 ${#text} ); do
        hit=$(( $hit + $(expr $text[$i] : '[ -~]') ))
    done
    length=$(( ${#text} - $(( $hit / 2 )) + 2 ))
    for i in $( seq 1 ${length} ); do
        header='人'$header
        footer='Ｙ'$footer
    done
    echo ＿${header}＿
    echo ＞　${text}　＜
    echo ￣${footer}￣
}

suddenize $1