Installation and Configuration
Programming Methodology

Reverse an Array in C++

In this exercise, you will implement a program that reverses an array. This task is useful in many scenarios such as reversing a list of elements, manipulating data structures, and understanding array indexing.

The program should use a loop to iterate over the array and swap elements, effectively reversing the order. This will help you practice array manipulation, swapping elements, and using loops in C++.

Group

Arrays and Vectors in C++

Objective

1. Define an array with several elements.
2. Implement a function or logic to swap elements in the array.
3. Start from both ends of the array and swap the elements until you reach the middle.
4. Output the reversed array.
5. Test the program with different arrays to ensure it works correctly.

Write a program that reverses an array.

Example C++ Exercise

 Copy C++ Code 
#include <iostream> // Include iostream for input and output
using namespace std; // Use the standard namespace

// Function to reverse an array
void reverseArray(int arr[], int size) {
    int temp; // Temporary variable for swapping

    // Loop through the array to swap elements from both ends
    for (int i = 0; i < size / 2; i++) {
        temp = arr[i]; // Store the current element in temp
        arr[i] = arr[size - 1 - i]; // Swap the current element with the element from the other end
        arr[size - 1 - i] = temp; // Put the value from temp into the other end
    }
}

int main() {
    // Define an array of numbers
    int numbers[] = {1, 2, 3, 4, 5};
    int size = sizeof(numbers) / sizeof(numbers[0]); // Calculate the size of the array

    // Output the original array
    cout << "Original array: ";
    for (int i = 0; i < size; i++) {
        cout << numbers[i] << " "; // Print each element in the array
    }
    cout << endl;

    // Reverse the array
    reverseArray(numbers, size);

    // Output the reversed array
    cout << "Reversed array: ";
    for (int i = 0; i < size; i++) {
        cout << numbers[i] << " "; // Print each element of the reversed array
    }
    cout << endl;

    return 0; // End of program
}

 Output

Original array: 1 2 3 4 5 
Reversed array: 5 4 3 2 1

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