Proper use of * and & when passing objects in methods
The method you have implemented, passing by pointer, is one of the two normal methods, yes. The other is passing by reference and is specific to C++, not C.

Under the hood the end result is the same between the two methods, by the syntactic "sugar" is very different and the latter can be preferable for that reason alone.

Your method:

void function(whatever *ob) {
    ob-&gt;method();
}

function(&amp;myObject);


The pass by reference method:

void function(whatever &amp;ob) {
    ob.method();
}

function(myObject);


As you can see the need to convert the object into a pointer with &amp; is now gone. That makes it much easier for people lacking in programming skills to use it since it hides the whole pointer mechanism from them.

Also, internally your function now treats ob as just another object using ., rather than a pointer to an object and needing to use -&gt;.  Note that you can only use the reference operator in a function prototype, not a variable or anything like that - it's purely for passing objects and variables to functions.  If you want to then go and store the pointer in a variable you still then have to get the address:

void function(whatever &amp;ob) {
    myObjectPointer = &amp;ob;
}


As you see it gets confusing with the two different uses of &amp;. Basically though: if it's in a function prototype it's the pass by reference operator. If it's anywhere else it's the get the address of operator (or a logical AND of course).

Storing the pointer can be useful if you want to then do other things later on with the same object, especially if you are yourself working with a class.  For instance, I often write code similar to the following:

class foo {
    private:
        bar *ob; // Pointer to other object of type "bar"
    public:
        foo(bar *inob) : ob(inob) {}
        foo(bar &amp;inob) : ob(&amp;inob) {}

        void something() {
            ob-&gt;doSomething();
        }

        void somethingElse() {
            ob-&gt;doSomethingElse();
            ob-&gt;evenMoreThings();
        }
};


You then have a choice of constructors:

bar myBar;
foo myFoo(myBar);

// ... later ...
foo.something();


or 

bar myBar;
foo myFoo(&amp;myBar);

// ... later ...
foo.something();


and the user doesn't have to remember which they need to use - whichever they try will work.