Example: Array Reversal using Pointers Function in C

// Array Reversal using Pointers Function
#include <stdio.h>

// Function to print the array
void printArray(int arr[], int size) {
    for (int i = 0; i < size; i++) {
        printf("%d ", arr[i]);
    }
    printf("\n");
}

// Function to reverse the array using pointers
void reverseArrayPointers(int *arr, int size) {
    // Pointers to the start and end of the array
    int *start_ptr = arr;
    int *end_ptr = arr + size - 1;

    while (start_ptr < end_ptr) {
        // Swap elements pointed to by start_ptr and end_ptr
        int temp = *start_ptr;
        *start_ptr = *end_ptr;
        *end_ptr = temp;

        // Move pointers towards the center
        start_ptr++;
        end_ptr--;
    }
}

int main() {
    // Step 1: Initialize an array
    int arr[] = {11, 22, 33, 44, 55};
    int n = sizeof(arr) / sizeof(arr[0]);

    // Step 2: Print original array
    printf("Original array: ");
    printArray(arr, n);

    // Step 3: Reverse the array using the pointer function
    reverseArrayPointers(arr, n);

    // Step 4: Print reversed array
    printf("Reversed array (pointers): ");
    printArray(arr, n);

    return 0;
}