#### Arithmetic calculation anomaly

I was trying to solve this exercise: https://www.codeabbey.com/index/task_view/fahrenheit-celsius
However, here is the solution:

``````#include <iostream>

using std::cout;
using std::cin;

int main()
{
int n, a;
cin >> n;
int* answers = new int[n]; // allocating memory
for (int i = 0; i < n; i++)
{
cin >> a;
answers[i] = (a - 32) * 5/9;
}

for (int i = 0; i < n; i++)
{
cout << answers[i] << ' ';
}

cout << 'n';
delete[]answers; //deallocating memory

system("pause");
return 0;
}
``````

Now, notice when I change `answers[i] = (a - 32) * 5/9;` to `answers[i] = (a - 32) * (5/9);`.
Here, is the difference in the output respectively:

1. Without the brackets: 2. With the brackets: What is this sorcery?

EDIT:
I understand why this can seem as a duplicate. My concern is not why 5/9 outputs 0. That is not my concern. My concern is what is the difference between the two following code:
– `answers[i] = (a – 32) * 5/9;`
– `answers[i] = (a – 32) * (5/9);`
When I do not use brackets, it works. But, when I use brackets it just outputs 0. So, the question is what is the bracket operator changing here? Please read the question carefully. Thanks!
Source: Windows Questions C++