OJ第六批——Problem C: A代码完善--哺乳动物

问题及代码：

Problem C: A代码完善--哺乳动物

Time Limit: 1 Sec Memory Limit:
128 MB

Submit: 151 Solved: 125

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Description

注：本题只需要提交填写部分的代码，请按照C++方式提交。

根据类 Mammal派生Cattle 和Horse ，输出动物的叫声。

#include <stdio.h>

#include <iostream>

using namespace std;

class Mammal

{

public:

virtual void Speak() const=0;

virtual ~Mammal() {}

};

/*

请在该部分补充缺少的代码

*/

int main()

{

Mammal *p;

p=new Cattle;

p->Speak(); //输出牛的叫声moo!

delete p;

p=new Horse;

p->Speak(); //输出马的叫声neigh!

delete p;

return 0;

}

Input

无

Output

动物的叫声

Sample Output

moo!
neigh!

HINT

#include <stdio.h>
#include <iostream>
using namespace std;
class Mammal
{
public:
virtual void Speak() const=0;
virtual ~Mammal() {}
};
class Cattle:public Mammal
{
public:
void Speak() const
{
cout<<"moo!"<<endl;
}
};

class Horse:public Mammal
{
public:
void Speak() const
{
cout<<"neigh!"<<endl;
}
};

int main()
{
Mammal *p;
p=new Cattle;
p->Speak();  //输出牛的叫声moo!
delete p;
p=new Horse;
p->Speak();  //输出马的叫声neigh!
delete p;
return 0;
}