Example: Check for Direct Equality in C

// Check for Direct Equality
#include <stdio.h>
#include <stdbool.h> // For boolean type

// Function to check if all elements in an array are equal
bool areAllEqual(int arr[], int n) {
    // Step 1: Handle empty or single-element arrays
    if (n <= 1) {
        return true;
    }

    // Step 2: Compare each element with the first element
    int firstElement = arr[0];
    for (int i = 1; i < n; i++) {
        if (arr[i] != firstElement) {
            return false; // Found a different element
        }
    }

    // Step 3: All elements are equal
    return true;
}

int main() {
    // Example 1: All elements are equal
    int arr1[] = {5, 5, 5, 5};
    int n1 = sizeof(arr1) / sizeof(arr1[0]);

    printf("Array: [");
    for (int i = 0; i < n1; i++) {
        printf("%d%s", arr1[i], (i == n1 - 1) ? "" : ", ");
    }
    printf("]\n");
    if (areAllEqual(arr1, n1)) {
        printf("Result: All numbers can be made equal (they already are).\n\n");
    } else {
        printf("Result: Not all numbers can be made equal.\n\n");
    }

    // Example 2: Elements are not equal
    int arr2[] = {1, 2, 3, 4};
    int n2 = sizeof(arr2) / sizeof(arr2[0]);

    printf("Array: [");
    for (int i = 0; i < n2; i++) {
        printf("%d%s", arr2[i], (i == n2 - 1) ? "" : ", ");
    }
    printf("]\n");
    if (areAllEqual(arr2, n2)) {
        printf("Result: All numbers can be made equal (they already are).\n\n");
    } else {
        printf("Result: Not all numbers can be made equal.\n\n");
    }

    return 0;
}