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Programming Methodology

Check if an Array is Symmetric in C++

In this exercise, you will create a function to determine if an array is symmetric. An array is considered symmetric if it reads the same forward and backward, meaning the first element is equal to the last, the second is equal to the second last, and so on. This problem will help you practice array traversal and comparison techniques.

In this task, you will implement a function that checks if the array is symmetric by comparing the elements from both ends of the array. The function should return true if the array is symmetric and false otherwise. You will need to handle arrays of various sizes, including even and odd-length arrays.

Group

Arrays and Vectors in C++

Objective

1. Define an array and initialize it with some values.
2. Create a function that compares the elements of the array from both ends.
3. The function should return true if the array is symmetric and false otherwise.
4. Test the program with different arrays, including arrays with an even and odd number of elements.
5. Output the result indicating whether the array is symmetric or not.

Implement a function that determines if an array is symmetric.

Example C++ Exercise

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

// Function to check if the array is symmetric
bool isSymmetric(int arr[], int size) {
    // Loop through half of the array
    for (int i = 0; i < size / 2; i++) {
        // Compare the element from the beginning with the corresponding element from the end
        if (arr[i] != arr[size - 1 - i]) {
            return false; // If a mismatch is found, the array is not symmetric
        }
    }
    return true; // If no mismatch is found, the array is symmetric
}

int main() {
    // Define an array with symmetric elements
    int arr[] = {1, 2, 3, 2, 1};
    int size = sizeof(arr) / sizeof(arr[0]); // Calculate the size of the array

    // Call the function to check if the array is symmetric
    if (isSymmetric(arr, size)) {
        cout << "The array is symmetric." << endl; // Output if the array is symmetric
    } else {
        cout << "The array is not symmetric." << endl; // Output if the array is not symmetric
    }

    return 0; // End of program
}

 Output

The array is symmetric.

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