十三周实验二

来源：互联网发布：access数据库编辑：程序博客网时间：2024/04/28 22:17

2.2

#include "iostream"#include<string>using namespace std;class Animal{public:virtual void cry() = 0;};class Mouse :public Animal{public:void cry() {cout<<"我叫Jerry，是一只老鼠，我的叫声是：吱吱吱！"<<endl;}Mouse(string Mouse_name);private:string Mouse_name;};class Cat :public Animal{public:void cry() {cout<<"我叫Tom，是一只猫，我的叫声是：喵喵喵！"<<endl;}Cat(string Cat_name);private:string Cat_name;};class Dog :public Animal{{public:void cry() {cout<<"我叫Gill，是长颈鹿，脖子太长，发不出声音来！"<<endl;}Giraffe(string Giraffe_name);private:string Giraffe_name;};Mouse::Mouse(string Mouse_name){this->Mouse_name=Mouse_name;}Cat::Cat(string Cat_name){(*this).Cat_name=Cat_name;}Dog::Dog(string Dog_name){this->Dog_name=Dog_name;}Giraffe::Giraffe(string Giraffe_name){this->Giraffe_name=Giraffe_name;}int main( ){Animal *p; //p = new Animal(); p->cry(); //输出: 不知哪种动物，让我如何学叫？(问题出自此处)Mouse m("Jerry"); p=&m; p->cry(); //输出: 我叫Jerry，是一只老鼠，我的叫声是：吱吱吱！Cat c("Tom");  p=&c; p->cry(); //输出: 我叫Tom，是一只猫，我的叫声是：喵喵喵！Dog d("Droopy");  p=&d; p->cry(); //输出: 我叫Droopy，是一条狗，我的叫声是：汪汪汪！Giraffe g("Gill");  p=&g; p->cry(); //输出: 我叫Gill，是长颈鹿，脖子太长，发不出声音来！//delete p;system("pause");return 0;}

#include "iostream"#include<string>using namespace std;class Animal{public:virtual void cry() = 0;Animal(string Animal_name);private:string Animal_name;};class Mouse :public Animal{public:void cry() {cout<<"我叫Jerry，是一只老鼠，我的叫声是：吱吱吱！"<<endl;}Mouse(string Mouse_name);};class Cat :public Animal{public:void cry() {cout<<"我叫Tom，是一只猫，我的叫声是：喵喵喵！"<<endl;}Cat(string Cat_name);};class Dog :public Animal{public:void cry() {cout<<"我叫Droopy，是一条狗，我的叫声是：汪汪汪！"<<endl;}Dog(string Dog_name);};class Giraffe :public Animal{public:void cry() {cout<<"我叫Gill，是长颈鹿，脖子太长，发不出声音来！"<<endl;}Giraffe(string Giraffe_name);};Animal::Animal(string Animal_name){this->Animal_name=Animal_name;}Mouse::Mouse(string Mouse_name):Animal(Mouse_name){}Cat::Cat(string Cat_name):Animal(Cat_name){}Dog::Dog(string Dog_name):Animal(Dog_name){}Giraffe::Giraffe(string Giraffe_name):Animal(Giraffe_name){}int main( ){Animal *p; //p = new Animal(); p->cry(); //输出: 不知哪种动物，让我如何学叫？(问题出自此处)Mouse m("Jerry"); p=&m; p->cry(); //输出: 我叫Jerry，是一只老鼠，我的叫声是：吱吱吱！Cat c("Tom");  p=&c; p->cry(); //输出: 我叫Tom，是一只猫，我的叫声是：喵喵喵！Dog d("Droopy");  p=&d; p->cry(); //输出: 我叫Droopy，是一条狗，我的叫声是：汪汪汪！Giraffe g("Gill");  p=&g; p->cry(); //输出: 我叫Gill，是长颈鹿，脖子太长，发不出声音来！//delete p;system("pause");return 0;}