Is there a nicer way to do c named arguments?

I'm trying to implement a flexible debug macro/function lib and named/optional arguments seem like the best way to implement the functions.

Is there a nicer way to do named arguments in c then the following?

enum named_args {NAME,ADRESS,AGE,NA_SENTINEL};

void named_arg_initializers(struct person p, enum * named_args)
{
    enum named_args * current_name;
    enum named_args * current_arg;
    ...
    if(named_args==NULL)
        return;
    current_name = named_args[0];
    current_arg = named_args[1];
    while(current_name!=NA_SENTINEL)
    {
        current_name+=2;
        current_arg+=2;
        if(current_name==NAME)
            p.name=current_arg;
        else if(...
        ...
        }
        ...
    }
    ...
}