多态性9-526互联

#include<iostream>
using namespace std;
class Counter{
public:
Counter(int c):count(c){}
int operator +(Counter &c2);
private:
int count;
};
int Counter::operator +(Counter &c2)
{
return count+c2.count;
}
int main()
{
Counter c1(2),c2(3);
cout<<"c1+c2="<<c1+c2<<endl;
return 0;
}