I've got a struct "margin" in my class with 4 properties. Instead of writing four different getter/setter methods, I figured I could do it in a better way:

```
class myClass {
    private:
        struct margin {
            int bottom;
            int left;
            int right;
            int top;
        }
    public:
        struct getMargin();
        void setMargin(string which, int value);
};

```

But how can I set the property of the struct corresponding with the string "which" from within the function `setMargin()`? For example, if I call `myClass::setMargin("left", 3)`, how can I then set "margin.left" to "3"? Preferably while keeping the struct [POD](https://stackoverflow.com/questions/146452/what-are-pod-types-in-c)? I really can't figure this out...

And on a side note, is this really better than writing many getter/setter methods?

Thanks!