字符串:a+b-c+d 如何分隔成:a,+b,-c,+d

Question

字符串:a+b-c+d 如何分隔成:a,+b,-c,+d  

Answer 1

void Main()
{
string str="a+b-c+d";
Console.WriteLine(str.Replace("+",",+").Replace("-",",-"));
//a,+b,-c,+d
}

Answer 2

正则(?'group'[+\-*/]*[a-z]+)取group分组

Answer 3

void Main()
{
string str="a+b-c+d";
Console.WriteLine(Regex.Replace(str,"([+-])",",$1"));
//a,+b,-c,+d
}

Answer 4

            string input = "aa+b+cc-ddd";
            string[] result = Regex.Split(input, @"(?<=\w)(?=\W)");
            foreach (string s in result)
            {
                Console.WriteLine(s);
            }

Answer 5

string  ss = "";
    string[] t = Regex.Split(ss, @"(?<=\w)(?=\w)");
    foreach (string s in t)
    {
      Console.WriteLine(s);
    }