C-Approach für call-by-reference

#include <iostream.h>

void f(int *p)
{
        (*p)++;
        cout << "in der Funktion " << *p <<endl;
}

main()
{
        int i=2;
        cout << "vorher " << i <<endl;
        f(&i);
        cout << "nachher " << i <<endl;
}