//----------------------------------------------
// Purpose: Demonstrate recursive grammars
// Author:  John Gauch
//----------------------------------------------
#include <iostream>
using namespace std;

//----------------------------------------------
string ParseInt(const string Input, const int pos)
{
   if ((pos < 0) || (pos >= int(Input.length())))
      return "";
   else if ((Input[pos] < '0') || (Input[pos] > '9'))
      return "";
   else
      return (Input[pos] + ParseInt(Input, pos + 1));
}

//----------------------------------------------
string ParseFloat(const string Input, const int pos)
{
   // ADD HERE
   return "";
}

//----------------------------------------------
int main()
{
   string input = "123.456hello";
   cout << "Input = " << input << endl;
   cout << "ParseInt = " << ParseInt(input, 0) << endl;
   cout << "ParseFloat = " << ParseFloat(input, 0) << endl;
}