Overloading Error

In a program I am writing I need to overload the addition operator to take a integer value and add it to a rational value. But when I try to compile it I get this error message: "must take either zero or one argument". Does anyone know what this means?? I've tried to make it a friend but when I do that it tells me that the prototype for that function does not match any in the class. So is there anything I can do???

It hard to know exactly what that means without looking at the code, but I think your missing a parameter in your overloaded operator. Your declaration should look like this but with Type replaced by the name of your class: Type operator+( Type& rhv );