Field is unknow in the class

[1190_5939_439]

Hi Experts

I am ready for calulating ball volume, the code and screent is following . But there is some error that I don't define get_volumn.

Can you help me ? Thanks

REPORT zjgltest02.

CLASS ball DEFINITION.
  PUBLIC SECTION.
    CONSTANTS pi TYPE f VALUE '3.14'.
    METHODS: get_volumn IMPORTING VALUE(radius) TYPE i
                        RETURNING VALUE(volumn) TYPE f.

ENDCLASS.

CLASS ball IMPLEMENTATION.
  METHOD get_volumn.
    volumn = 4 * pi * radius  * radius * radius  / 3.
  ENDMETHOD.
ENDCLASS.

DATA:volumn   TYPE        f,
     ball_obj TYPE REF TO ball.
DATA:res TYPE p DECIMALS 2.
PARAMETERS:radius TYPE i.

START-OF-SELECTION.
  CREATE OBJECT ball_obj.
  volumn = ball_obj->get_volumn(radius).
  MOVE volumn TO res.
  WRITE:/res.

[joltdx]

Hi!

Yes, whey you type

volumn = ball_obj->get_volumn(radius).

The systems thinks that get_volumn is a variable and that you want to specify the length to read with (radius). Instead, you need to include spaces around radius so it is interpreted as a method call:

volumn = ball_obj->get_volumn( radius ).

You also need to add spaces to the WRITE statement:

WRITE: / res.