Thread: Working with functions

I don't know if this is a suitable subforum to talk about the the following
Suppose we have a function called foo() which receive two arguments foo(a,b) and swap them.

Code:

int n1 = 2, n2 = 33;
// before swap
print n1, n2;
foo(n1,n2);
// after swap
print n1, n2;

// the function
foo(a, b) {
 int temp = a;
 a = b;
 b = temp;
}

The expected output:
>> 2 33
>> 33 2

Is that right or de we have to work with "pointers"?