C++ Assigning Values to POD Objects [duplicate]

Answer 1

Maybe boost::fusion can help you with what you want to archive.
You can use the adapt macro to iterate over a struct. From the example of boost:

struct MyClass 
{
    int ID;
    int age;
    double height;
};

BOOST_FUSION_ADAPT_STRUCT(
    MyClass,
    (int, ID)
    (int, age)
    (double, height)
)

void fillData(int& i)
{
    i = 0;
}

void fillData(double& d)
{
    d = 99;
}

struct MoreColumns
{
    template
    void operator()(T& t) const
    {
        fillData(t);
    }
};

int main()
{
    struct MyClass m = { 33, 5, 2.0 };
    std::cout << m.ID << std::endl;
    std::cout << m.age << std::endl;
    std::cout << m.height << std::endl;

    MoreColumns c;
    boost::fusion::for_each(m, c);

    std::cout << m.ID << std::endl;
    std::cout << m.age << std::endl;
    std::cout << m.height << std::endl;
}