`luc010.c`¶

Problem Statement

A five-digit number is entered through the keyboard. Write a program to obtain the reversed number and to etermine whether the original and reversed numbers are equal or not.

Metadata¶

Property	Detail
Author	Amit Dutta (amitdutta4255@gmail.com)
License	MIT
Difficulty	Beginner (index: 1 / 10)

Concepts¶

Beta Feature

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Recursion
Pointers
Iteration

Actions¶

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Source Code¶

#include <stdio.h>
int main()
{
    int num, rev, temp, i;
    printf("Please enter the number : ");
    scanf("%d", &num);
    if (num < 10000 || num > 99999)
    {
        printf("\nPlease enter a five digit number.");
        return 1;
    }
    temp = num;
    for (i = 1; i <= 5; i++)
    {
        rev = (rev * 10) + num % 10;
        num = num / 10;
    }
    printf("\nReverse of the Input number : %d", rev);
    if (rev == temp)
        printf("\nOriginal and reversed numbers are equal.");
    else
        printf("\nOrigianl and reversed numbers are not equal.");
    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 (luc010.c):

    #include <stdio.h>
    int main()
    {
        int num, rev, temp, i;
        printf("Please enter the number : ");
        scanf("%d", &num);
        if (num < 10000 || num > 99999)
        {
            printf("\nPlease enter a five digit number.");
            return 1;
        }
        temp = num;
        for (i = 1; i <= 5; i++)
        {
            rev = (rev * 10) + num % 10;
            num = num / 10;
        }
        printf("\nReverse of the Input number : %d", rev);
        if (rev == temp)
            printf("\nOriginal and reversed numbers are equal.");
        else
            printf("\nOrigianl and reversed numbers are not equal.");
        return 0;
    }

luc010.c¶