Copy a struct array to another struct array that is smaller

Question

My struct array has 5 slots

struct router* router[5];

Lets say there are elements inside them, and then i make

router[3] = NULL;

Is it possible to rearrange the array so that the element in router[4] moves up to router[3], router[5] moves to router[4] etc.?

Of course it's possible. Just use assignment operator or memmove. route[3] = router[4]; router[4] = NULL;. Or please clarify your question if you are really trying to ask something different. — kaylum
– kaylum, Commented Oct 10, 2016 at 19:26
Since you probably need to make your code resilient to NULL entries anyway, you might consider doing just that, and leave NULL in the middle of your array. — jxh
– jxh, Commented Oct 10, 2016 at 19:29
Also note that there is no router[5] element as router[4] is the last valid element in the array. — kaylum
– kaylum, Commented Oct 10, 2016 at 19:30

Ben Wainwright · Accepted Answer · 2016-10-10 19:36:18Z

1

Try this

void delete(struct router** router, int which, int size) {
    int i;
    // If these pointers have no other references to them then
    // Then you should free the one being deleted at this point
    for(i = which; i < size - 1; i++) {
       router[i] = router[i + 1];
    }
    router[i] = NULL;

}

answered Oct 10, 2016 at 19:36

Ben Wainwright

4,7111 gold badge21 silver badges42 bronze badges

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

Collectives™ on Stack Overflow

Copy a struct array to another struct array that is smaller

1 Answer 1

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Related