Which way is best/right? pointers and referances

[TimBowl]

When changing a variable using a function, when the variable is outside that function, using pointers, which way is best? They both seem to do the same thing, the same way, but i wanted to know the right way. The first way is quicker to write.

first way is to call a function change(int a)
and to receive change(int& x){ x = 7}

the second way is to call the function change(int &a)
and receive change(int *x){*x = 7}

both change a to 7.
I would probably use the first one because its easier and simpler to write out.
but i would love to know the answer

[S G H]

If you need to change an array, you shouldn't use references.
Otherwise, it's a matter of preference...
Many times, references are no more than hidden pointers, so there is really no difference in speed or memory usage.

[Cubbi]

That's what references are for. When in doubt, look at the standard library: from std::swap to std::getline, from std::advance to std::lock, whenever a function needs to change a parameter, it takes it by reference.

(Note, there is nothing special for the arrays, std:swap takes references to arrays)