C++ :: Debug Function For Application - Output Values List

I'm trying to write a debug functions for my application so I can see all the values I like to. My goal is it looks like this:

Code:
void Debug(std::message, ...)

So that I can call it like this:

Code:
Debug("Error: %i, %i", 34, 35);

How I can work with %i, or if there are better solutions. This is what I've so far (not much), just a basic idea:

Code:
void Debug( std::string message, ...) {
va_list list;
va_start(list, message);
??? va_arg(list, ?? );
va_end(list);
// here message should contain everything and be ready for output ?
cout << message << endl;
}