第十三周项目1(2)-动物这样叫

/*
 *Copyright (c) 2014, 烟台大学计算机学院
 *All rights reserved.
 *文件名称：week13-1-2.cpp
 *作者：高赞
 *完成日期：2015年 5 月 29 日
 *版本号：v1.1
 *
 *问题描述：使Animal设计为抽象类
 */
#include <iostream>

using namespace std;

class Animal
{
public:
    virtual void cry()=0;
};
class Mouse:public Animal
{
public:
    Mouse() {}
    Mouse (string a,char b):MouseName(a),MouseSex(b)
    {
        string sex;
        if(MouseSex=='m')
            sex="公";
        else sex="母";
        cout<<"我叫"<<MouseName<<"，是一只"<<sex<<"老鼠，我的叫声：";
    }
    void cry()
    {
        cout<<"吱吱吱！"<<endl;
    }
private:
    string MouseName;
    char MouseSex;
};
class Cat:public Animal
{
public:
    Cat() {}
    Cat(string a):CatName(a)
    {
        cout<<"我叫"<<CatName<<"，是一只猫，我的叫声：";
    }
    void cry()
    {
        cout<<"喵喵喵！"<<endl;
    }
private:
    string CatName;
};
class Dog:public Animal
{
public:
    Dog() {}
    Dog(string a):DogName(a)
    {
        cout<<"我叫"<<DogName<<"，是一只狗，我的叫声：";
    }
    void cry()
    {
        cout<<"汪汪汪！"<<endl;
    }
private:
    string DogName;
};
class Giraffe:public Animal
{
public:
    Giraffe() {}
    Giraffe (string a,char b):GiraffeName(a),GiraffeSex(b)
    {
        string sex;
        if(GiraffeSex=='m')
            sex="公";
        else sex="母";
        cout<<"我叫"<<GiraffeName<<"，是一头"<<sex<<"长颈鹿，";
    }
    void cry()
    {
        cout<<"我不能发声！"<<endl;
    }
private:
    string GiraffeName;
    char GiraffeSex;
};
int main( )
{
    cout<<"不知哪种动物，让我如何学叫？"<<endl;
    Animal *p;
    //p = new Animal();抽象类不能定义对象故不能用指针开辟空间
    Mouse m1("Jerry",'m');
    p=&m1;
    p->cry();
    Mouse m2("Jemmy",'f');
    p=&m2;
    p->cry();
    Cat c1("Tom");
    p=&c1;
    p->cry();
    Dog d1("Droopy");
    p=&d1;
    p->cry();
    Giraffe g1("Gill",'m');
    p=&g1;
    p->cry();
    return 0;
}

 

 

抽象类不能定义对象故不能用指针开辟空间