c++ program to reverse an array

#include <iostream>
using namespace std;

void reverseArray(int arr[], int start, int end) {
    while (start < end) {
        int temp = arr[start];
        arr[start] = arr[end];
        arr[end] = temp;
        start++;
        end--;
    }
}

void printArray(int arr[], int size) {
    for (int i = 0; i < size; i++) {
        cout << arr[i] << " ";
    }
    cout << endl;
}

int main() {
    int arr[] = {1, 2, 3, 4, 5};
    int size = sizeof(arr) / sizeof(arr[0]);

    cout << "Original array: ";
    printArray(arr, size);

    reverseArray(arr, 0, size - 1);

    cout << "Reversed array: ";
    printArray(arr, size);

    return 0;
}

Explanation:

• reverseArray function takes three arguments: the array to be reversed (arr[]), the starting index (start), and the ending index (end). It reverses the elements within the specified range using a while loop.
• printArray function simply prints the elements of the array passed to it.
• In main function:
• An array arr is initialized with values {1, 2, 3, 4, 5}.
• size variable stores the size of the array using sizeof.
• The original array is printed using the printArray function.
• The reverseArray function is called with the array, starting index 0, and ending index size - 1.
• The reversed array is printed using the printArray function.