重载前置++运算符

#include<iostream>using namespace std;class num{public:num(){n=1;}~num(){}int get()const{return n;}void set(int x){n=x;}void operator++(){++n;}private:int n;};int main(){num i;cout<<"i:"<<i.get()<<endl;++i;cout<<"i:"<<i.get()<<endl;return 0;}