标签:计算 脚本 first please \n enter sed code inpu
#!/bin/bashecho "$firstnum" | sed -r ‘s#[^0-9]##g‘
" != "$firstnum" ]echo "$secondnum" | sed -r ‘s#[^0-9]##g‘
" != "$secondnum" ]标签:计算 脚本 first please \n enter sed code inpu
原文地址:http://blog.51cto.com/13588698/2151522