正则表达式请教

Question

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Text.RegularExpressions;namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            string s = "SUM(l3*(1+k3/100))";
            string r = Regex.Replace(s, @"([a-zA-Z]+)(\d+)", "${1}" + "100");
            Console.WriteLine(r);
        }
    }
}

Answer 1

string result = Regex.Replace(yourStr,@"(?i)(?<=[a-z])\d+","100");

Answer 2

Regex.Replace(s, @"([a-zA-Z]+)(\d+)", "${1}" + "100");