subroutines using and changing

[Former Member]

Hi All,

I am using a subroutines like this.

 data num1 type i.
data num2 type i.
data res type i.

num1 = 10.
num2 = 20.

perform add.

form add.

res = num1 + num2.

write : res.

endform.

This returns the result.

But what are the changes if I use changing and using parameters and how do i use it in the current context.

Regards.

Sagar

[Former Member]

hi,

in ur code ur r passing static local data to subroutine.

data num2 type i.

data res type i.

num1 = 10.

num2 = 20.

perform add.

form add.

res = num1 + num2.

write : res.

endform.

but if u use using and changing formal parameters ,then they can behave as dynamic local objects to the subroutine:

the code will look like:

perform add using num1 num2 changing res.

form add using x type i

y type i

changing z type i.

[Former Member]

perform add.

form add.

res = num1 + num2.

write : res.

endform.

replace with this logic

perform add using num1 num2 changing res.

form add using num1 num2 changing res..

res = num1 + num2.

write : res.

endform.