Array Stack logical error

[akashgk]

In the given push method. we allow the user to add elements even if the count is equal to length of stack.

file: data_structures/Stack/array_stack

Also need to add test cases

  //Push a item to the stack
  void push(T item) {
    if (count == n) {
      print("The stack is full\n");
    }
    stack[count] = item;
    count++;
  }