Can someone please help me with a number conversion program?

[mister grim]

I have to design a number conversion program for Uni.
Basically, what I have to do is create a program that will convert a four digit Arabic numeral of a year (eg. 1988) into Roman numerals (eg. MCMLXXXVIII).
I am completely stumped. I will be eternally grateful to anyone who can help me.
Thank you!

[ArchAngel]

Do a google search. There are many known solutions.

[mister grim]

Thanks for the advice ArchAngel!
I googled it and came up with some example source code that I couldn't understand.

Last night I came up with my own (written english) algorithm which was quite simple. The program I need to write from this is fairly simple (well...for the average Java user - not me of course ), but I need help getting it started.

Could someone please design a small program where the user is prompted to enter two single digit numbers (0-9). If the user enters [1], then the program should print "A", if they enter [2] then it should print "B", if they enter [3] then it should print "C" and so on. I was hoping that the consecutinve letters would be printed next to each other without spaces.

So if the user enters 1 as the first digit, then 2 as the second, I want the program to output the letters "AB".

If you could do this for me I could improvise from there and complete the program. I seem to be better at learning how to program by imitating others
Thank You.

[ArchAngel]

If want people to reply, it's generally best to ask a specific question, rather than ask them to write a program. But, I'm feeling rather chirpy today, so here it is:

import java.io.*;

public class Int2Str {
        public static void main(String[] args) throws IOException {
                BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
                System.out.print("Enter 1st Number: ");
                String line1 = br.readLine();
                System.out.print("Enter 2nd Number: ");
                String line2 = br.readLine();

                // Validate the input - I'll leave that to you and assume everything's OK.

                int indexBeforeA = 'A' - 1;

                // Calculate the appropriate Unicode index

                int i1 = indexBeforeA + Integer.parseInt(line1);
                int i2 = indexBeforeA + Integer.parseInt(line2);

                // Convert the integers to chars

                char c1 = (char)i1;
                char c2 = (char)i2;

                System.out.println("Output: " + c1 + c2);
        }
}

The only bit of code in this that you might find a little strange should be:

                int indexBeforeA = 'A' - 1;

                // Calculate the appropriate Unicode index

                int i1 = indexBeforeA + Integer.parseInt(line1);

Put simply, when you cast an int to a char, it uses the int value as an index into a unicode table of characters. 'A' == 45 (I think). Because you wanted 'A' to be output if the user entered '0', I had to do a little bit of maths to offset the input.

Hope this helps,

ArchAngel.

[mister grim]

Thank you so much for that!