algorithms code

FUNCTION is_full(top)
IF top == MAX_SIZE - 1 THEN
RETURN True
ELSE
RETURN False
ENDIF
ENDFUNCTION


FUNCTION push(stack, top, data)
IF is_full(top) == True THEN
PRINT("Stack is full")
ELSE
top = top + 1
stack[top] = data
ENDIF
RETURN top
ENDFUNCTION

FUNCTION is_empty(top)
IF top == -1 THEN
RETURN True
ELSE
RETURN False
ENDIF
ENDFUNCTION

FUNCTION pop(stack, top)
IF is_empty(top) == True THEN
PRINT ("Stack is empty - nothing to pop")
popped_item = Null
ELSE
popped_item = stack[top]
top = top - 1
ENDIF
RETURN (popped_item, top)
ENDFUNCTION