`lucproblem013.c`¶

Problem Statement

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

Metadata¶

Property	Detail
Author	Amit Dutta (amitdutta4255@gmail.com)
License	MIT
Difficulty	Beginner (index: 3 / 10)

Concepts¶

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Pointers
Recursion
Array

Actions¶

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Source Code¶

#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;
}

Explanation¶

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    You are explaining a C programming code to a beginner.

    STRICT RULES:

    - Only use the given code. Do NOT assume anything not present.

    - Do NOT add extra examples.

    - Keep explanation clear and short.

    - If something is unclear, say "Not clear from code".

    - Follow the exact format below. Do NOT change headings.

    FORMAT:

    [START]

    ## What it does

    (Explain the overall purpose in 1-2 sentences)

    ## Step-by-step

    (Explain how the code works in steps, simple language)

    ## Key Concepts

    (List concepts like loop, condition, function, etc.)

    ## Notes

    (Mention any limitations, errors, or assumptions)

    [END]

    CODE (lucproblem013.c):

    #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;
    }

lucproblem013.c¶