Example: Array Equality Check (Iterative) in C

// Array Equality Check (Iterative)
#include <stdio.h>
#include <stdbool.h> // For using bool type

// Function to compare two integer arrays for equality
bool areArraysEqual(int arr1[], int size1, int arr2[], int size2) {
    // Step 1: Check if the sizes of the arrays are different
    if (size1 != size2) {
        return false; // Arrays cannot be equal if their sizes differ
    }

    // Step 2: Iterate through the arrays and compare elements
    for (int i = 0; i < size1; i++) {
        if (arr1[i] != arr2[i]) {
            return false; // Found a differing element, so arrays are not equal
        }
    }

    // Step 3: If loop completes, all elements were identical
    return true; // Arrays are equal
}

int main() {
    // Example 1: Equal arrays
    int arrA[] = {10, 20, 30, 40, 50};
    int sizeA = sizeof(arrA) / sizeof(arrA[0]);

    int arrB[] = {10, 20, 30, 40, 50};
    int sizeB = sizeof(arrB) / sizeof(arrB[0]);

    // Example 2: Unequal arrays (different element)
    int arrC[] = {10, 20, 30, 40, 55};
    int sizeC = sizeof(arrC) / sizeof(arrC[0]);

    // Example 3: Unequal arrays (different size)
    int arrD[] = {10, 20, 30};
    int sizeD = sizeof(arrD) / sizeof(arrD[0]);

    printf("Comparing arrA and arrB: %s\n", areArraysEqual(arrA, sizeA, arrB, sizeB) ? "Equal" : "Not Equal");
    printf("Comparing arrA and arrC: %s\n", areArraysEqual(arrA, sizeA, arrC, sizeC) ? "Equal" : "Not Equal");
    printf("Comparing arrA and arrD: %s\n", areArraysEqual(arrA, sizeA, arrD, sizeD) ? "Equal" : "Not Equal");

    return 0;
}