Question

Write a Java program.

In the "modern Roman" system a number is also a sequence of M's, D's, C's, L's, X's, V's, and 1's. The symbols have to appear more or less in that order and the value of a number is obtained as before with one important exception: A symbol C, X, or I may precede a symbol of higher value, in which case the value of that symbol C, X, or I is taken to be negative. Write a Function that will convert a decimal number to a modern Roman numeral. Demo 999 Examples Decimal Classical Roman Modern Roman 4 IV VIll IX 91

Answer 1

Please find the java program to convert decimal number into modern roman equivalent :

DecimalToModernRoman.java :

import java.io.*;
class DecimalToModernRoman
{
public static void main(String args[]) throws IOException
{
BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
System.out.print("Input a Decimal Number : ");
int n=Integer.parseInt(br.readLine()); //Input the decimal number

if(n>0 && n<4000) //Enter the number in range 1-3999
{

//Decimal numbers equivalent to roman numbers
String thousands[]={"","M","MM","MMM"};
String hundreds[]={"","C","CC","CCC","CD","D","DC","DCC","DCCC","CM"};
String tens[]={"","X","XX","XXX","XL","L","LX","LXX","LXXX","XC"};
String units[]={"","I","II","III","IV","V","VI","VII","VIII","IX"};

int ts=n/1000;
int h=(n/100)%10;
int t=(n/10)%10;
int u=n%10;

// Print the roman equivalent
System.out.println("The modern roman equivalent of decimal number " +n );
System.out.println("is - " +thousands[ts]+hundreds[h]+tens[t]+units[u]);
}

//Error message
else
System.out.println("Entered number is out of Range.Enter in range of 1-3999");
}
}

Output:

"DecimalToModernRoman.java: import java.io.*: class DecimalToModernRoman { public static void main(String args[]) throws IOException { BufferedReader br=new BufferedReader(new InputStreamReader(System.in)): System.out.print(""Input a Decimal Number: ""): int n=Integer.parseInt(br.readLine()): //Input the decimal number if(n > 0 && n < 4000) //Enter the number in range 1-3999 { //Decimal numbers equivalent to roman numbers String thousands[]={"""",""M"",""MM"",""MMM""}: String hundreds[]={"""",""C"",""CC"",""CCC"",""CD"",""D"",""DC"",""DCC"",""DCCC"",""CM""}: String tens[]={"""",""X"",""XX"",""XXX"",""XL"",""L"",""LX"",""LXX"",""LXXX"",""XC""}: String units[]={"""",""I"",""II"",""III"",""IV"",""V"",""VI"",""VII"",""VIII"",""IX""}: int ts=n/1000: int h=(n/100)%10: int t=(n/10)%10: int u=n%10: // Print the roman equivalent System.out.println(""The modern roman equivalent of decimal number "" +n): System.out.println(""is +thousands[ts]+hundreds[h]+tens[t]+units[u]): } //Error message else System.out.println(""Entered number is out of Range.Enter in range of 1-3999""): } } Output: Input a Decimal number: 91 The modern roman equivalent of decimal number 91 is - XCI BUILD SUCCESSFUL (total time: 4 seconds) INPUT a Decimal Number: 999 The modern roman equivalent od decimal number 999 is - CMXCIX BUILD SUCCESSFUL (total time: 3 seconds)"