Question

object oriented programming:
Write a program that converts a number entered in decimal to
Roman numerals. Your program should consist of a class, say, romanType. An
object of type romanType should do the following:
a. Store the number as a decimal.
b. Convert and store the number into roman form.
c. Print the number as a Roman numeral or decimal number as requested
by the user.
The decimal values of the Roman numerals are:
M 1000
D 500
C 100
L 50
X 10
V 5
I 1

Answer 1

#include <iostream>

#include <string>

using namespace std;

class romanType

{

public:

    romanType(int);

    void decToRoman();

    void printIndecmal();

    void printInRoman();

private:

    string numR;

    int numD;

};

romanType::romanType(int n)

{numR="";

numD=n;

}

void romanType::decToRoman()

{int numbers[8]={1,5,10,50,100,500,1000,5000},i,p,num;

char letters[8]={'I','V','X','L','C','D','M'};

num=numD;

    while(num>0)

        {i=0;

         while(i<7)

            {while(num>=numbers[i]&&num<numbers[i+1])

                 {p=i%2;

                   if(num>=numbers[i+1]-numbers[i-p])

                        {numR=numR+letters[i-p]+letters[i+1];

                         num=num-(numbers[i+1]-numbers[i-p]);

                         }

                    else

                         {numR=numR+letters[i];

                          num=num-numbers[i];

                          }

                    }

               i++;

              }

          }

}

void romanType::printIndecmal()

{cout<<numD;

}

void romanType::printInRoman()

{cout<<numR;

}

int main()

{int n;

cout<<"Enter a number to convert: ";

cin>>n;

romanType r(n);

r.decToRoman();

r.printIndecmal();

cout<<" decimal = ";

r.printInRoman();

cout<<" roman\n";

system("pause");

return 0;

}