`P061.c`¶

Problem Statement

Write a C program to find the sum of even elements in an array using a user defined function. Define a functions int sumEven(int arr[], int n) that returns the sum of all even elements in the array.

Metadata¶

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

Concepts¶

Beta Feature

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Recursion
Array
Sorting (possible)
Iteration

Actions¶

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Source Code¶

#include <stdio.h>

void inputarr(int[], int);
int sumEven(int[], int);

int main()
{
    int arr[20], n;
    printf("Enter the n (Max: 20): ");
    scanf("%d", &n);
    inputarr(arr, n);
    printf("\nSum of the even number in the array: %d", sumEven(arr, n));
    return 0;
}

void inputarr(int arr[], int n)
{
    int i;
    for (i = 0; i < n; i++)
    {
        printf("Enter element %d: ", i + 1);
        scanf("%d", &arr[i]);
    }
}

int sumEven(int arr[], int n)
{
    int i, sum_even = 0;
    for (i = 0; i < n; i++)
    {
        if (arr[i] % 2 == 0)
        {
            sum_even += arr[i];
        }
    }
    return sum_even;
}

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 (P061.c):

    #include <stdio.h>

    void inputarr(int[], int);
    int sumEven(int[], int);

    int main()
    {
        int arr[20], n;
        printf("Enter the n (Max: 20): ");
        scanf("%d", &n);
        inputarr(arr, n);
        printf("\nSum of the even number in the array: %d", sumEven(arr, n));
        return 0;
    }

    void inputarr(int arr[], int n)
    {
        int i;
        for (i = 0; i < n; i++)
        {
            printf("Enter element %d: ", i + 1);
            scanf("%d", &arr[i]);
        }
    }

    int sumEven(int arr[], int n)
    {
        int i, sum_even = 0;
        for (i = 0; i < n; i++)
        {
            if (arr[i] % 2 == 0)
            {
                sum_even += arr[i];
            }
        }
        return sum_even;
    }

P061.c¶