C++ 多重继承 函数重载 未搞清楚问题

#include "stdafx.h"
#include <iostream>

using namespace std;

class ZooAnimal { };
class Bear : public ZooAnimal { };

class Endangered { };

class Panda : public Bear, public Endangered { };

void print(const Bear&) { cout << __LINE__ << endl; }
void print(const Endangered&) { cout << __LINE__ << endl; }
void print(const ZooAnimal&) { cout << __LINE__ << endl; }

void _tmain(int argc, _TCHAR* argv[])
{
Panda ying_yang;
print(ying_yang);
}