How to create first ABAP global class (simple calculator) in transaction SE24 (part II)?

Step 12. Click on ADD method:

Step 13. Click on Parameters button:

Step 14. Add parameters as on the following screen:

Step 15. Click on Sourcecode button:

Step 16. The system will ask you if you want to save changes. Click on Yes button:

Step 17. On this screen you can put code fo method ADD. Just like on the screen:

r_result = i_a + i_b.

Step 18. Click on Back button:

Step 19. Click on Methods button:

Step 20. Follow steps 12-19 for the SUBSTRACT method. Put following ABAP in method body:

r_result = i_a - i_b.

Step 21. Follow steps 12-19 for the MULTIPLY method. Put following ABAP in method body:

r_result = i_a - i_b.

Step 22. Follow steps 12-19 for the DIVIDE method. Put following ABAP in method body:

r_result = i_a - i_b.

Step 23. Click on Activate button to activate your class.

Step 24. Now you can use this global class in your ABAP report:

DATA: lv_result type int4.

result = zcl_calculator=>add( i_a = 5 i_b = 12).

WRITE: result.