YTU-OJ-Problem C: A代码完善--哺乳动物

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

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