What is the second parameter int for in a function declaration with enum

[fl]

Hi,

When I search enum usage, I find the following example below. I find
that the definition:


inline Card::Suit operator++( Card::Suit &rs, int )


is interesting to me. What is the second parameter int for? Could you
tell me? Thanks.


..................................
// enumeration_declarations.cpp
class Card
{
public:
enum Suit
{
Diamonds,
Hearts,
Clubs,
Spades
};
// Declare two constructors: a default constructor,
// and a constructor that sets the cardinal and
// suit value of the new card.
Card();
Card( int CardInit, Suit SuitInit );


// Get and Set functions.
int GetCardinal(); // Get cardinal value of card.
int SetCardinal(); // Set cardinal value of card.
Suit GetSuit(); // Get suit of card.
void SetSuit(Suit new_suit); // Set suit of card.
char *NameOf(); // Get string representation of
card.
private:
Suit suit;
int cardinalValue;



};


// Define a postfix increment operator for Suit.
inline Card::Suit operator++( Card::Suit &rs, int )
{
return rs = (Card::Suit)(rs + 1);


}


int main()
{

 

[Pavel Volkovskiy]

It is postfix operator (e.g. i++, while prefix operator (e.g. ++i
has operator++() signature.

http://msdn.microsoft.com/en-us/library/f6s9k9ta(v=vs.80).aspx