Namaran

counter.cpp

#include <iostream>

struct Counter {
    int value = 0;

    Counter& operator++() {       // prefix
        ++value;
        return *this;
    }
    Counter operator++(int) {     // postfix
        Counter old = *this;
        ++value;
        return old;
    }
};

int main() {
    Counter c;
    std::cout << (++c).value << " ";
    std::cout << (c++).value << " ";
    std::cout << c.value << "\n";
}