求来个高手用C#语言拆分简单的数学表达式

Question

数学c#需求

Answer 1

感觉要用到栈，匹配括号用递归的思想会拆分（a+b）*（c+d）其它的也能拆分了

Answer 2

public string[] Analyze(string input)
        {
            input = input.Replace(" ",string.Empty);
            Regex regclearbracket = new Regex(@"\(([^(]+?)\)");
            Regex regclearcomma = new Regex(@"([,\d\$]+\*[,\d\$]+)");            MatchEvaluator evalclearbracket = new MatchEvaluator(RepClearBracket);
            MatchEvaluator evalclearcomma = new MatchEvaluator(RepClearComma);            while (regclearbracket.IsMatch(input))
            {
                input = regclearbracket.Replace(input, evalclearbracket);
                while (regclearcomma.IsMatch(input))
                    input = regclearcomma.Replace(input, evalclearcomma);
            }            return input.Replace("$","*").Replace(",","+").Split(new char[] { '+' }, StringSplitOptions.RemoveEmptyEntries);
        }        public string RepClearBracket(Match m)
        {
            return m.Groups[1].Value.Replace("+", ",").Replace("*","$");
        }        public string RepClearComma(Match m)
        {
            cs c = new cs(m.Groups[1].Value.Split(new char[] { '*' }, StringSplitOptions.RemoveEmptyEntries));
            return c.ToString();
        }
public class cs
    {
        public cs(string[] c)
        {
            l = c[0].Split(new char[] { ',' }, StringSplitOptions.RemoveEmptyEntries);
            r = c[1].Split(new char[] { ',' }, StringSplitOptions.RemoveEmptyEntries);
        }        public string[] l;        public string[] r;        public override string ToString()
        {
            List<string> yz = new List<string>();            for (int i = 0; i < l.Length; i++)
            {
                for (int j = 0; j < r.Length; j++)
                {
                    yz.Add(l[i] + "$" + r[j]);
                }
            }            return string.Join(",", yz.ToArray());
        }
    }