来自http://www.learncpp.com/cpp-tutorial/142-function-template-instances/classCents{private:intm_nCents;public:Cents(intnCents):m_nCents(nCents){}friendbooloperator>(Cents&c1,Cents&c2)//c2.m_nCents)?true:false;}};我们也可以这样实现:classCents{private:intm_nCents;public:Cents(intnCents):m_nCents(nCents){}bo