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c++pointersiteratorstdlist

Pointer for item in iteration over std::list

I'm working on a very basic game and I have a std::list collection of objects that pertain to my game. I declared it as:

std::list<Target> targets;

When I iterate over it, using

for (std::list<Target>::iterator iter = targets.begin(); iter != targets.end(); iter++) {
        Target t = *iter;
                t.move();
}

My objects aren't updating on the GUI. However, replacing the iterating loop with a targets.front().move(), my one object moves correctly. I think this is because I am not iterating over the collection using pointers. Can anyone explain how that is done? Thanks.

Solution

  • You are copying the objects, do it this way: 

    *iter.move()

    If you use Target t = *iter; you are essentially making a copy of your object and moving it, instead of moving your intended object.

    As xtofl said(thx) you can get the reference as well. 

    Target &t = *iter;
t.move();