Question

I would like to take the Roman Numeral value stored in the object and convert it back to integer, long, float, and double values. I really don’t know where to start, other than creating the appropriate methods. Can anyone offer some advice?

http://pastebin.com/sqwdhbtu

Thanks!

Answer 1

Your question seems to be how to convert a roman numeral to integer. In that case all you need is one function to parse the string from left to right and add the result together while looking for smaller numbers that should be subtracted.

class RomanNumeral{
  String roman;

  public RomanNumeral(String roman){
    this.roman = roman;
  }

  public RomanNumeral Clone(){
    return new RomanNumeral(this.roman);
  }

  public int GetValue(){
    int sum = 0;
    int carry = 0;
    for(int i = 0; i< roman.Length;i++)
    {
     if(i<roman.Length-1){
       if(GetRomanValue(roman[i])>GetRomanValue(roman[i+1])){
          sum += GetRomanValue(roman[i]) - carry;
          carry = 0;
       }
     else carry = GetRomanValue(roman[i]);
    }
    else sum += GetRomanValue(roman[i]) - carry;
  }
 }

  int GetRomanValue(char c)
  {
    switch(c){
     case 'I': return 1;
     case 'V': return 5;
     //and so on...
    }
   }
}

Once you have the integer you can cast it to the other numeric types.