Function template Bubble Sort

#include <iostream>
#include <cstdlib>

using namespace std;

template <class T>
void bubbleSort(T arr[], int size){
    bool flag = true;
    for(int i = 0; (i < size-1) && flag; i++){
        flag = false;
        for(int j = 0; j < size-i-1; j++){
            if(arr[j] > arr[j + 1]){
                T temp = arr[j];
                arr[j] = arr[j + 1];
                arr[j + 1] = temp;
                flag = true;
            }
        }
    }
}

template <class T>
void display(T arr[], int size){
    for(int i = 0; i < size; i++){
        cout << arr[i] << ", ";
    }
    cout << endl;
}

template <class T>
void input(T arr[], int size){
    for(int i = 0; i < size; i++){
        cout << "arr[" << i << "] = ";
        cin >> arr[i];
    }
}

int main() {
    system("cls");

    int arr1[] = {38, 41, 56, 32, 14, 22};
    double arr2[] = {1.2, 7.4, 3.3, 7.4, 6.93};
    int size1 = sizeof(arr1) / sizeof(arr1[0]);
    int size2 = sizeof(arr2) / sizeof(arr2[0]);

    cout << "Before sorting\n";
    display(arr1, size1);
    bubbleSort(arr1, size1);
    cout << "After sorting\n";
    display(arr1, size1);

    cout << endl;

    cout << "Before sorting\n";
    display(arr2, size2);
    bubbleSort(arr2, size2);
    cout << "After sorting\n";
    display(arr2, size2);

    return 0;
}