Why doesn't the compiler find the prototype?

Question

C++ / C#

Hello

//header.h
class Shop:public Queue{
private:
  int rating;
public:
  Shop(int rating = 0,const Queue &q);
};

//func.cpp
Shop::Shop(int rating,const Queue &q):Queue(q){}

Compiler output: default argument omitted for parameter 2

Answer 1

Got it: optional parameters should be on the right