Thursday, January 14, 2021

Decimal To Roman Numeral in Java

 Machine Problem in Java

Write a program to ask the user to give a number and then the program will convert the given number into Roman numeral equivalent.

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Program Listing


/**

Machine Problem in Java


Write a program to ask the user to give a number and then the 

program will convert the given number into Roman numeral 

equivalent.


 @author Jake Rodriguez Pomperada,MAED-IT, MIT

 www.jakerpomperada.com / www.jakerpomperada.blogspot.com

 jakerpomperada@gmail.com

 Bacolod City, Negros Occidental Philippines

 January 14, 2021 Thursday 8:58 PM

*/


import java.util.*;



public class Decimal_Roman_Numeral {


private static String Convert_To_Roman_Numeral(int num) {

String[] romanCharacters = { "M", "CM", "D", "C", "XC", "L", "X", "IX", "V", "I" };

int[] romanValues = { 1000, 900, 500, 100, 90, 50, 10, 9, 5, 1 };

String result = "";

 

for (int i = 0; i < romanValues.length; i++) {

int numberInPlace = num / romanValues[i];

if (numberInPlace == 0) continue;

result += numberInPlace == 4 && i > 0? romanCharacters[i] + romanCharacters[i - 1]:

new String(new char[numberInPlace]).replace("\0",romanCharacters[i]);

num = num % romanValues[i];

}

return result;

}

 

public static void main(String[] args) {

// TODO Auto-generated method stub

Scanner sc=new Scanner(System.in);

        int num=0;

        

        System.out.println();  

    System.out.println("\tDecimal To Roman Numeral in Java");

    System.out.println();

     

        System.out.print("\tGive a Number : ");

        num=sc.nextInt();

     

        System.out.println();

        System.out.println("\tThe Decimal Value   : " + num);

        System.out.println("\tRoman Numeral Value : "

        + Convert_To_Roman_Numeral(num));

        System.out.println();

        System.out.println("\tEnd of Program");

        System.out.println("\n");

        sc.close();

}


} // End of Code



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