第十四周 项目一:动物怎么叫?(抽象类)
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/** 程序的版权和版本声明部分* Copyright (c)2012, 烟台大学计算机学院学生* All rightsreserved.* 作者: 李洋* 完成日期: 2013年 6 月 2 日* 版本号: v1.0* 输入描述:无* 问题描述:无* 程序输出:无*/#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,char); virtual void cry();protected: string name; char sex;};Mouse::Mouse(string nam,char se){ name=nam; sex=se;}//叫声void Mouse::cry(){ cout<<"我叫"<<name<<",是一只"<<((sex=='m')?"男":"女")<<"老鼠,我的叫声是:吱吱吱!"<<endl;}class Cat: public Animal{public: Cat(string); virtual void cry();protected: string name;};//构造函数Cat::Cat(string nam){ name=nam;}//叫声void Cat::cry(){ cout<<"我叫"<<name<<",是一只老鼠,我的叫声是:喵喵喵!"<<endl;}class Dog: public Animal{public: Dog(string); virtual void cry();protected: string name;};//构造函数Dog::Dog(string nam){ name=nam;}//叫声void Dog::cry(){ cout<<"我叫"<<name<<",是一条狗,我的叫声是:汪汪汪!"<<endl;}class Giraffe:public Animal{public: Giraffe(string,char); virtual void cry();protected: string name; char sex;};//构造函数Giraffe::Giraffe(string nam,char se){ name=nam; sex=se;}//叫声void Giraffe::cry(){ cout<<"我叫"<<name<<",是"<<((sex=='m')?"男":"女")<<"长颈鹿,我的脖子太长,发不出声音来!"<<endl;}int main( ){ Animal *p; p=new Animal(); //为指针开辟空间 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;}
/** 程序的版权和版本声明部分* Copyright (c)2012, 烟台大学计算机学院学生* All rightsreserved.* 作者: 李洋* 完成日期: 2013年 6 月 2 日* 版本号: v1.0* 输入描述:无* 问题描述:无* 程序输出:无*/#include <iostream>#include <string.h>using namespace std;class Animal{public: virtual void cry() =0;};class Mouse: public Animal{public: Mouse(string,char); virtual void cry();protected: string name; char sex;};Mouse::Mouse(string nam,char se){ name=nam; sex=se;}//叫声void Mouse::cry(){ cout<<"我叫"<<name<<",是一只"<<((sex=='m')?"男":"女")<<"老鼠,我的叫声是:吱吱吱!"<<endl;}class Cat: public Animal{public: Cat(string); virtual void cry();protected: string name;};//构造函数Cat::Cat(string nam){ name=nam;}//叫声void Cat::cry(){ cout<<"我叫"<<name<<",是一只老鼠,我的叫声是:喵喵喵!"<<endl;}class Dog: public Animal{public: Dog(string); virtual void cry();protected: string name;};//构造函数Dog::Dog(string nam){ name=nam;}//叫声void Dog::cry(){ cout<<"我叫"<<name<<",是一条狗,我的叫声是:汪汪汪!"<<endl;}class Giraffe:public Animal{public: Giraffe(string,char); virtual void cry();protected: string name; char sex;};//构造函数Giraffe::Giraffe(string nam,char se){ name=nam; sex=se;}//叫声void Giraffe::cry(){ cout<<"我叫"<<name<<",是"<<((sex=='m')?"男":"女")<<"长颈鹿,我的脖子太长,发不出声音来!"<<endl;}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;}