#include <iostream>

class SomeClass {
public:
    SomeClass() : m_val(1) {}

    SomeClass& operator++() { m_val *= 2; return *this; }
    SomeClass operator++(int) { m_val *= 4; return *this; }

    int m_val;
};

int main(void) {
    std::cout << (++SomeClass()).m_val << std::endl;
    std::cout << (SomeClass()++).m_val << std::endl;
    return 0;
}