헤더파일

class Something { public: static int s_value; }; int Something::s_value = 1; int main() { cout

#include class Calc { private: int m_value; public: Calc(int init_value) : m_value(init_value) { } Calc& add(int value) { m_value += value; return *this; } Calc& sub(int value) { m_value -= value; return *this; } Calc& mult(int value) { m_value *= value; return *this; } void print() { using namespace std; cout