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;
}