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I have implemented Bubble Sort. How to add counters in the program so that I can calculate and display the Best Case, Worst Case & Average Case Time Complexity of this program?

```
#include <iostream>
using namespace std;
void bubbleSort(int arr[], int n);
int compb = 0, compw = 0;
int main()
{
int arr[20], arr1[20], n, i;
cout << "Enter the Size of Array: ";
cin >> n;
cout << "\nEnter the Elements of Array: ";
for(i = 0; i < n; i++)
{
cin >> arr[i];
arr1[i] = arr[i];
}
bubbleSort(arr, n);
cin.get();
cin.ignore();
return 0;
}
void bubbleSort(int arr[], int n)
{
int i, j, temp;
for(i = 0; i < n; i++)
{
compb++;
for(j = 0; j < n - 1; j++)
{
if(arr[j] > arr[j+1])
{
temp = arr[j];
arr[j] = arr[j+1];
arr[j+1] = temp;
compa++;
}
compw++;
}
}
cout << "\nSorted Array using Bubble Sort: ";
for(i = 0; i < n; i++)
{
cout << arr[i];
}
}
```