Q)Write a program that converts a number entered in Roman numerals to decimal. Your program should consist of a class, say, romanType. An object of type romanType should do the following:  Store the number as a Roman numeral.  Convert and store the number into decimal form.  Print the number as a Roman numeral or decimal number as requested by the user. The decimal values of the Roman numerals are:
 Test your program using the following Roman numerals: MCXIV, CCCLIX, MDCLXVI.

#include<iostream>

using namespace std;

class romanType{

      char R[8]; //intialized by the constructor

      int decimal; //stores the decimal number after converting

public:

      romanType(); //constructor

      void R2D(); //declaration of a function to convert roman into decimal

      int get_decimal();//declaration of a function to get decimal number

    bool operator>=(int);//operator overloading

     

};

int main()

{

      romanType ob; //creating the object

      ob.R2D();

      if (ob >= 0)

            cout << "Decimal : " << ob.get_decimal() << endl;

      else

            cout << "Invalid Format of a number" << endl;

}

void romanType::R2D()

{

      char a[1000];

      cout << "Enter the number in roman format(M-D-C-L-X-V-I) :";

      cin >> a;

      int dec,l,n=0;

      l = strlen(a); //cal the length of char string

      for (int i = l-1; i>=0; i--) //cal from roman to decimal format

      {

            a[i] = toupper(a[i]);

            if (a[i] == R[0])

                  dec = 1000;

            else if (a[i] == R[1])

                  dec = 500;

            else if (a[i] == R[2])

                  dec = 100;

            else if (a[i] == R[3])

                  dec = 50;

            else if (a[i] == R[4])

                  dec = 10;

            else if (a[i] == R[5])

                  dec = 5;

            else if (a[i] == R[6])

                  dec = 1;

            else

            {

                  decimal = -1;

                  break;     

            }

            if (n > dec)

                  decimal = (decimal-dec);

            else

                  decimal = decimal + dec;     

            n = dec;

      }

}

int romanType::get_decimal() //function to return the decmial number

{

      return decimal;

}

romanType::romanType()//Constructor

{

      R[0] = 'M';

      R[1] = 'D';

      R[2] = 'C';

      R[3] = 'L';

      R[4] = 'X';

      R[5] = 'V';

      R[6] = 'I';

      decimal = 0;

}

bool romanType::operator>=(int n = 0)

{

      if (decimal >= 0)

            return 1;

      else

            return 0;

}