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couturier

France
291 Posts
Posted - 11/22/2017 :  09:00:52 AM  Show Profile  Edit Topic  Reply with Quote  View user's IP address  Delete Topic
Origin Ver. and Service Release (Select Help-->About Origin): 2018 SR0
Operating System: win10

Hi,

I'm trying to write a function with optional output, such as:
void test_null(vector v1, vector& v2 = NULL, vector& v3 = NULL)
{
	v2=2*v1;
	v3=3*v1;
}

with v2 and v3 being calculated only if they are specified.
How to write that kind of function ?

Thanks for your help

eparent

118 Posts
Posted - 11/22/2017 :  11:18:47 AM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
The following shows how to test if the optional arguments were specified.

void test_null(vector v1, vector& v2 = NULL, vector& v3 = NULL)
{
	if( v2 )
		v2=2*v1;
	if( v3 )
		v3=3*v1;
}
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couturier

France
291 Posts
Posted - 11/23/2017 :  06:53:37 AM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
So simple !
thanks
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n/a

6 Posts
Posted - 12/14/2017 :  10:02:53 AM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
hi all, my name is Arsen)) I am a new member here )) thanks for your post , nice to meet you all here, in this web site


:)
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