#!/bin/bash # m4.sh: m4 ¸ÅÅ©·Î ÇÁ·Î¼¼¼ ¾²±â. # ¹®ÀÚ¿ string=abcdA01 echo "len($string)" | m4 # 7 echo "substr($string,4)" | m4 # A01 echo "regexp($string,[0-1][0-1],\&Z)" | m4 # 01Z # »ê¼ú½Ä echo "incr(22)" | m4 # 23 echo "eval(99 / 3)" | m4 # 33 exit 0