C++ functions: ampersand vs asterisk

Question

Let\'s say you have a function that modifies a variable.

Should you write it like this: void myfunc(int *a) or like this void myfunc(int &a)

Answer 1

Something to note, if you are using stl functors, it is easier if the parameter matches the container value type.

void foo(Bar *);

void frobnicate(vector vecBars)
{
   for_each(vecBars.begin(), 
            vecBars.end(), 
            ptr_fun(&foo));
}

The above code is much harder if foo takes Bar&