Find max in Array Function C++

#include <iostream>

// Function to find the maximum value in an array
int findMax(const int arr[], int size) {
    if (size <= 0) {
        // Handle the case of an empty array or invalid size
        throw std::invalid_argument("Invalid array size");
    }

    int maxVal = arr[0]; // Assume the first element is the maximum

    for (int i = 1; i < size; ++i) {
        if (arr[i] > maxVal) {
            maxVal = arr[i]; // Update maxVal if a larger element is found
        }
    }

    return maxVal;
}

int main() {
    int arr[] = {12, 45, 6, 78, 32, 56, 89, 21};
    int size = sizeof(arr) / sizeof(arr[0]);

    try {
        int max = findMax(arr, size);
        std::cout << "The maximum value in the array is: " << max << std::endl;
    } catch (const std::invalid_argument& e) {
        std::cerr << e.what() << std::endl;
    }

    return 0;
}