`luc059.c`¶

Problem Statement

Write a program which initializes an integer array of 10 elements in main(), passes it to modify(), multiplies each element by 3, and prints the new array in main().

Metadata¶

Property	Detail
Author	Amit Dutta amitdutta4255@gmail.com
Date	08 Feb 2026
License	MIT License (See the LICENSE file for details)
Difficulty	Beginner (index: 1 / 10)

Concepts¶

Beta Feature

This concept detection system is still in beta and may occasionally show incorrect or incomplete results.

Array
Pointers
Iteration
Sorting (possible)
Recursion

Actions¶

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Source Code¶

#include <stdio.h>
#include <math.h>
#include <stdlib.h>

void modify(int *, int);

int main()
{
    int arr[10] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10};
    int i;

    printf("Original Array:\n");
    for (i = 0; i < 10; i++)
        printf("%d ", arr[i]);

    modify(arr, 10);

    printf("\n\nModified Array (x3):\n");
    for (i = 0; i < 10; i++)
        printf("%d ", arr[i]);
    printf("\n");

    return 0;
}

void modify(int *a, int n)
{
    int i;
    for (i = 0; i < n; i++)
    {
        a[i] = a[i] * 3;
    }
}

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 (luc059.c):

    #include <stdio.h>
    #include <math.h>
    #include <stdlib.h>

    void modify(int *, int);

    int main()
    {
        int arr[10] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10};
        int i;

        printf("Original Array:\n");
        for (i = 0; i < 10; i++)
            printf("%d ", arr[i]);

        modify(arr, 10);

        printf("\n\nModified Array (x3):\n");
        for (i = 0; i < 10; i++)
            printf("%d ", arr[i]);
        printf("\n");

        return 0;
    }

    void modify(int *a, int n)
    {
        int i;
        for (i = 0; i < n; i++)
        {
            a[i] = a[i] * 3;
        }
    }

luc059.c¶