7/21/12Roman_number

#include <iostream>
using namespace std;
struct NumType{
       int decimal_num;
      string roman_num;
       };
class romanType
{

      public:
      NumType myNum;

      romanType(string newnum){
      myNum.roman_num=newnum;
      myNum.decimal_num=convertRomantoDecimal(newnum);}

      int convertRomantoDecimal(string roman_num)
      {
          int intNum=0;
          for(int i=0;i<roman_num.length();i++)
          {
                  int temp=0;
                  switch (roman_num[i]){
                         case 'M':
                              temp=1000;break;
                         case 'D':
                              temp=500;break;
                         case 'C':
                              temp=100;break;
                         case 'L':
                              temp=50;break;
                         case 'X':
                              temp=10;break;
                         case 'V':
                              temp=5;break;
                         case 'I':
                              temp=1;break;
                         default:
                              cout<<"error number"<<endl;
                         }
                    intNum+=temp;
          }
          return intNum;
      }

      void printNum()
      {
           int choice;
           cout<<"Enter 1 for Roman Number, 2 for Decimal number"<<endl;
           cin>>choice;
           if(choice==1){cout<<myNum.roman_num<<endl;}
           else if(choice==2){cout<<myNum.decimal_num<<endl;}
           else{cout<<"Invaild input."<<endl;}

      }
};
int main(){
    romanType R1("MCXIV");
    romanType R2("CCCLIX");
    romanType R3("MDCLXVI");

    R1.printNum();
    R2.printNum();
    R3.printNum();
    system("pause");
    return 0;
    }