>>You mean like this?
Yes.
Now change this:
bubbleSort(int numbers[], int array_size); //this is a function declaration
to this:
bubbleSort(numbers[], array_size); //this is a function call
and once you've sorted them display the sorted results as you indicated you would with this statement.
cout << "Your sorted grades are: ";
Lastly, download one of the free compilers/IDE, like Dev-C++, so you can do homework at home. It is almost impossible to do/learn a computer language without having a compiler in your immediate possession.