/*
 * Author: Amit Dutta (amitdutta4255@gmail.com) | Date: 12 Dec 2025
 * Repo: https://github.com/notamitgamer/bsc
 * License: MIT
 */

/* Define a function to convert any given year into its Roman equivalent.
Use these roman equivalent for decimal numbers : 1 - I, 5 - V, 10 - X,
50 - L, 100 - C, 500 - D, 1000 - M */
/* Let Us C, Chap - 8, Page - 141, Problem 8.3 */

#include <stdio.h>

void romanise(int);

void romanise(int year)
{
    int values[] = {1000, 900, 500, 400, 100, 90, 50, 40, 10, 9, 5, 4, 1};
    const char *romanChar[] = {"M", "CM", "D", "CD", "C", "XC", "L", "XL", "X", "IX", "V", "IV", "I"};
    // including the two-character subtractive pairs.
    int i = 0;

    printf("Year %d = ", year);
    while (year > 0)
    {
        if (year >= values[i])
        {
            printf("%s", romanChar[i]);
            year -= values[i];
        }
        else
            i++;
    }
}

int main()
{
    int year;
    printf("Enter the year : ");
    scanf("%d", &year);
    romanise(year);
    return 0;
}