How do I take a stack from left to right to right to left in the stack.cpp?

Quote:

I need help in knowing how to modify the code in Stack.cpp (which is a standard stack) so it implements a stack so it fills the array from right to left

Advice: Never do this. Stack.cpp is optimized to be efficient the way it is done.
I don't know what is your need, but reading the stack in reverse order is not a problem.
rather than :

for (i = Stack.bottom; i <= Stack.top; i++) {
    // do stuff
    }

you need to swap the values :

for (i = Stack.top; i >= Stack.bottom; i--) {
    // do stuff
    }

The code is just to illustrate the principle.