正则表达式中不能算数运算?

welf

如我要将1.0.0.0 变成 1.0.0.1

1. $str  =~ s/(\d+.\d+.\d+.)(\d+)/$1$2++/e;

复制代码

不好使


求助正确的用法或别的思路

zhlong8

$2 是 readonly 的，vstring的匹配我不太清楚，变成字符串怎么样？

$s = '1.0.0.0';
$s =~ s/(\d+.\d+.\d+.)(\d+)/$1.($2+1)/e;

jason680

如我要将1.0.0.0 变成 1.0.0.1不好使


求助正确的用法或别的思路
welf 发表于 2010-11-23 15:48

s/(\d+\.\d+\.\d+\.)(\d+)/sprintf("%s%d",$1,$2+1)/e;
or
s/(\d+\.\d+\.\d+\.)(\d+)/$1.($2+1)/e;

you can't use $2++
Modification of a read-only value attempted at ...

welf

多谢