c assign function pointer to variable

Question

I have two functions,

//virDomain is some struct
int virDomainCreate(virDomain*);
int virDomainDestroy(virDomain*);

How do I assign these two functions to a variable?

I tried,

int (*func)(virDomain*) = NULL;
func = virDomainCreate(virDomain*); // not working
func = &virDomainDestroy(virDomain*); //not working

Thanks for all your help! Waka.

This post might help clarify how to use function pointers stackoverflow.com/questions/840501/… — C.B.
– C.B., Commented Mar 10, 2014 at 20:02
You might find cprogramming.com/tutorial/function-pointers.html useful, too. — Josh Durham
– Josh Durham, Commented Mar 10, 2014 at 20:05

Arjun Sreedharan · Accepted Answer · 2014-03-10 20:10:50Z

7

You can just assign the pointer to the function like:

func = &virDomainCreate;

Or you can just use the short format:

func = virDomainCreate;

answered Mar 10, 2014 at 20:01

Arjun Sreedharan

11.5k2 gold badges29 silver badges35 bronze badges

Sign up to request clarification or add additional context in comments.

2 Comments

I would add that maybe func = &virDomainCreate is the safe way to do it.

Salman Zafar · Accepted Answer · 2019-11-18 12:11:16Z

1

The return type is int so

int func;
func = virDomainCreate(virDomain*); 
func = virDomainDestroy(virDomain*);

will work.

Salman Zafar

4,0655 gold badges23 silver badges44 bronze badges

answered Mar 10, 2014 at 20:09

learner

4,8289 gold badges57 silver badges102 bronze badges