Sum Two Arrays Element by Element in C++

In this exercise, you will implement a function that sums two arrays element by element. This means that for two given arrays of the same size, the function will return a new array where each element is the sum of the corresponding elements in the original arrays.

This practice focuses on element-wise operations, a fundamental concept in data processing, computer graphics, and mathematical computing.

Logic Components

1. Parallel Iteration

We use a single loop index i to access the same position in three different arrays simultaneously.

2. Element-wise Addition

The operation C[i] = A[i] + B[i] ensures that only values at the matching indices are combined.

3. Buffer Storage

A result array is pre-allocated to store the outputs, preserving the original data in the input arrays.

Learning Objectives

1. Manage multiple arrays within a single loop.
2. Practice function parameters involving arrays and pointers.
3. Understand the importance of consistent array sizes for linear operations.
4. Learn to output processed data from a result buffer.

Solution Implementation

sum_arrays.cpp Linear Algorithm

#include <iostream>
using namespace std;

// Function to sum two arrays element by element
void sumArrays(int arr1[], int arr2[], int result[], int size) {
    // Loop through each element of the arrays
    for (int i = 0; i < size; i++) {
        result[i] = arr1[i] + arr2[i]; // Add corresponding elements
    }
}

int main() {
    int arr1[] = {1, 2, 3, 4, 5};
    int arr2[] = {5, 4, 3, 2, 1};
    int size = sizeof(arr1) / sizeof(arr1[0]);
    int result[size]; // Result array

    sumArrays(arr1, arr2, result, size);

    cout << "Summed array: ";
    for (int i = 0; i < size; i++) {
        cout << result[i] << " ";
    }
    cout << endl;

    return 0;
}

Console Output:

Summed array: 6 6 6 6 6

Learning Objectives

Solution Implementation

Console Output:

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