overloading postfix and prefix operators

Question

please consider following code

#include 
using namespace std;
class Digit
{

private:
    int m_digit;
public:
    Digit(int ndigit=0){
             


        

Answer 1

The operator, just as any function, is identified by the signature. The return type and modifiers before the function/operator name is not included in this. Your operators names are here

operator++()
operator++(int)

This is the only way the compiler distinguishes between the two. As for the Digit& and Digit return values; They are needed because of the way ++x, and x++ are supposed to operate.