YTU 2954: A改错题--是虫还是草

2954: A改错题--是虫还是草

时间限制: 1 Sec 内存限制: 128 MB

提交: 83 解决: 55

题目描述

冬虫夏草为虫体与菌座相连而成，冬天是虫子，夏天却是草。根据类生物(biological)，虫(insect)，草(grass)，虫草(insectgrass)的继承关系，输出生物的名字。

注：本题只需要提交修改和完善部分的代码，请按照C++方式提交。

#include <iostream>

using namespace std;

class Biological

{

public:

    Biological(string name) { this->name=name; }

    virtual void Say() =0;

    virtual ~Biological() {}

    string GetName() { return name; }

private:

    string name;

};

/*   修改和完善该部分代码

class Insect:virtual public Biological

{

public:

    Insect(string name):Biological(name) {}

    virtual void Say() { cout<<this->GetName()<<"是虫"<<endl; }

    virtual ~Insect() {}

};

class Grass:virtual public Biological

{

public:

    Grass(string name):Biological(name) {}

    virtual ~Grass() {}

};

class InsectGrass:public Insect,public Grass

{

public:

    InsectGrass(string name):Insect(name),Grass(name) {}

    virtual ~InsectGrass() {}

};

*/

int main()

{

    Biological *p[3];

    string name;

    getline(cin,name);

    p[0]=new Insect(name);

    getline(cin,name);

    p[1]=new Grass(name);

    getline(cin,name);

    p[2]=new InsectGrass(name);

    for(int i=0; i<3; i++)

    {

        p[i]->Say();

        delete p[i];

    }

    return 0;

}

输入

第一行，虫的名字

第二行，草的名字

第三行，虫草的名字

输出

每行输出相应的名字及类别。

样例输入

Coccinellidae

Prunella vulgaris

Cordyceps sinensis

样例输出

Coccinellidae是虫

Prunella vulgaris是草

Cordyceps sinensis是虫也是草

你离开了，我的世界里只剩下雨。。。

#include <iostream>

using namespace std;

class Biological

{

public:

    Biological(string name)

    {

        this->name=name;

    }

    virtual void Say() =0;

    virtual ~Biological() {}

    string GetName()

    {

        return name;

    }

private:

    string name;

};

class Insect:virtual public Biological

{

public:

    Insect(string name):Biological(name) {}

    void Say()

    {

        cout<<this->GetName()<<"是虫"<<endl;

    }

    virtual ~Insect() {}

};

class Grass:virtual public Biological

{

public:

    Grass(string name):Biological(name) {}

    void Say()

    {

        cout<<this->GetName()<<"是草"<<endl;

    }

    virtual ~Grass() {}

};

class InsectGrass:public Insect,public Grass

{

public:

    InsectGrass(string name):Insect(name),Grass(name),Biological(name) {}

    void Say()

    {

        cout<<this->GetName()<<"是虫也是草"<<endl;

    }

    virtual ~InsectGrass() {}

};

int main()

{

    Biological *p[3];

    string name;

    getline(cin,name);

    p[0]=new Insect(name);

    getline(cin,name);

    p[1]=new Grass(name);

    getline(cin,name);

    p[2]=new InsectGrass(name);

    for(int i=0; i<3; i++)

    {

        p[i]->Say();

        delete p[i];

    }

    return 0;

}

是虫