项目1-动物这样叫

//02.* Copyright (c) 2013, 烟台大学计算机学院
//04.* 作    者: 马德鹏
//05.* 完成日期：2014 年 5 月 29 日
//06.* 版 本 号：v1.0
//07.*
#include <iostream>
#include <string>
using namespace std;
class Animal
{
public:
    virtual void cry()
    {
        cout<<"不知哪种动物，让我如何学叫？"<<endl;
    }
};
class Mouse: public Animal
{
public:
    Mouse(string nam,char s):name(nam),sex(s) {}
    void cry()
    {
        if(sex=='m')
        {
            cout<<"我叫"<<name<<","<<"是一只男老鼠，我的叫声是：吱吱吱！"<<endl;
        }
        else if(sex=='f')
        {
            cout<<"我叫"<<name<<","<<"是一只女老鼠，我的叫声是：吱吱吱！"<<endl;
        }
    }
private:
    string name;
    char sex;
};
class Cat:virtual public Animal
{
public:
    Cat(string nam):name(nam) {}
    void cry()
    {
        cout<<"我叫"<<name<<","<<"是一只猫，我的叫声是：喵喵喵！"<<endl;
    }
private:
    string name;
};
class Dog:virtual public Animal
{
public:
    Dog(string nam):name(nam) {}
    void cry()
    {
        cout<<"我叫"<<name<<","<<"是一只狗，我的叫声是：汪汪汪！"<<endl;
    }
private:
    string name;
};
class Giraffe:virtual public Animal
{
public:
    Giraffe(string nam,char s):name(nam),sex(s) {}
    void cry()
    {
        cout<<"我叫"<<name<<","<<"是男长颈鹿，我的脖子太长，发不出声音来！"<<endl;
    }
private:
    string name;
    char sex;
};
int main( )
{
    Animal *p;
    p = new Animal();
    p->cry();
    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;
}