Is there a way of applying a function to each member of a struct in c++?

Question

You have a simple struct, say:

typedef struct rect
{
    int x;
    int y;
    int width;
    int height;
}
rect;

And you want to multiply

Answer 1

if all your elements are of the same type:

for (int i = 0; i < sizeof(rect) / sizeof(rect.x) ; ++i) {
    do_something(reinterpret_cast(adress_of_your_struct) + i);
}

with do_something expecting a pointer to int