static void Main(string[] args)
{
Console.WriteLine("please input your number");
var userInput = Console.ReadLine();
try
{
for (int i = 0; i < userInput.Length; i++)
{
var c = userInput[i];
CheckCharFun = null;
var type = GetCharType(c);
if (CheckCharFun.Invoke(c, i))
{
CheckedTypes.Add(type);
}
else
{
throw new Exception("not a valid number");
}
}
Console.WriteLine("success");
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
Console.Read();
}
static CharType GetCharType(char c)
{
if (Array.IndexOf(DigitalChar, c) > -1)
{
CheckCharFun += CheckDigital;
return(CharType.Digital);
}
if (Array.IndexOf(PointChar, c) > -1)
{
CheckCharFun += CheckPoint;
return(CharType.Point);
}
if (Array.IndexOf(EChar, c) > -1)
{
CheckCharFun += CheckE;
return(CharType.E);
}
if (Array.IndexOf(PlusChar, c) > -1)
{
CheckCharFun += CheckPlus;
return(CharType.Plus);
}
else
{
throw new Exception("not a valid number");
}
}
static private int GetToken(string s, ref int i, ref List<string> words, CheckChar func, bool ifTrue)
{
if (i == -1)
{
return i;
}
string word = "";
if (ifTrue)
{
while (i < s.Length && func(s[i]))
{
word += s[i++];
}
}
else if (!ifTrue)
{
while (i < s.Length && !func(s[i]))
{
word += s[i++];
}
}
else
{
}
if (word.Length > 0)
{
words.Add(word);
}
return i < s.Length ? i : -1;
}