[C++基础]022_运算符重载

#include <iostream>
using namespace std;

class Tree{
public:
Tree(){
num = 0;
}
void operator ++(){
num++;
}

int num;
};

int main(){

Tree tree;
cout<<tree.num<<endl;
tree++;
cout<<tree.num<<endl;

system("pause");
return 0;
}