iterator

[mickey]

I'd like to convert iterator to int without using map. is it possible?


vector<boj>::iterator ll;
//int i=1;
for (ll=boj.begin(); ll != boj.end(); ++ll)
printf("boj number %i\n",
// i++ I'd like to avoid this way. I don't like


And why use '++ll' in for and not 'll++'? Thanks

[jacek]

why use '++ll' in for and not 'll++'? Thanks
ll++ is less effective, because it must create a copy of the iterator, increment the iterator and return that copy.

[wysota]

And for some iterators postfix ++ operator is not defined.

[mickey]

thanks a lot! But the first part of my post have answer? Thanks

[jacek]

But the first part of my post have answer?
Didn't you ask that question earlier?

[mickey]

It was similar...


int i = abs(obj.begin() - ll);

I hope this is good......

[mcosta]

It was similar...


int i = abs(obj.begin() - ll);

I hope this is good......

The correct way is



int i = distance(obj.begin(), ll);