YTU-OJ-Problem C: A代码完善--哺乳动物

Problem C: A代码完善--哺乳动物

Time Limit: 1 Sec   Memory Limit: 128 MB
Submit: 136   Solved: 111
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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
#include
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 
#include 
using namespace std;
class Mammal
{
public:
    virtual void Speak() const=0;
    virtual ~Mammal() {}
};

//
class Cattle:public Mammal
{
public:
    virtual void Speak() const
    {
        cout<<"moo!"<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;
}