Find second largest element from an array.cpp

int getSecondLargest(vector<int> &arr) {
    int n = arr.size();

    int largest = -1, secondLargest = -1;

    for (int i = 0; i < n; i++) {
        if(arr[i] > largest) {
            secondLargest = largest;
            largest = arr[i];
        }
        else if(arr[i] < largest && arr[i] > secondLargest) {
            secondLargest = arr[i];
        }
    }
    return secondLargest;
}