13.10) The Old C Approach: Pointers

void swap(int* x, int* y)
{
  int tmp = *x;
  *x = *y;
  *y = temp;
}

• No reference type in C, so instead we must declare the parameters as pointers
• When calling the function, we must remember to pass the addresses of variables as arguments, which we obtain with the & operator
• This approach works in C++, but should be avoided - references are a cleaner solution!