1、试编程

封装一个动物的基类，类中有私有成员:姓名，颜色，指针成员年纪再封装一个狗这样类，共有继承于动物类，自己拓展的私有成员有:指针成员:腿的个数(整型intcount)，共有成员函数:会叫:void speak()
要求:分别完成基类和派生类中的:构造函数、析构函数、拷贝构造函数、拷贝赋值函数

#include <iostream>using namespace std;class Animal
{
private:string name;string color;int *age;
public://无参构造函数Animal(){}//有参构造函数Animal(string name, string color, int age):name(name),color(color),age(new int(age)){cout << "父类：有参构造函数" << endl;}//析构函数~Animal(){cout << "析构函数" << endl;}//拷贝构造函数Animal(const Animal &other):name(other.name),color(other.color),age(new int(*other.age)){cout << "父类：拷贝构造函数" << endl;}//拷贝赋值函数Animal &operator=(const Animal &other){if(this != &other){name = other.name;color = other.name;age = new int(*other.age);}cout << "父类：拷贝赋值函数" << endl;return *this;}};class Dog:public Animal
{
private:int *leg;
public:Dog(){}Dog(string name,string color,int age,int leg):Animal(name,color,age),leg(new int(leg)){cout << "dog 有参构造函数" << endl;}Dog(const Dog &other):Animal(other),leg(new int (*other.leg)){cout << "dog 拷贝构造函数" << endl;}Dog &operator=(const Dog &other){if(this != &other){Animal::operator=(other);leg = new int(*other.leg);}cout << "dog 拷贝赋值函数" << endl;return *this;}void speak(){cout << "汪汪汪" <<endl;}~Dog(){cout << " dog 析构函数" << endl;}};int main()
{Dog d1;Dog d2("小蒜","yellow",2,4);Dog d3(d2);d1 = d3;return 0;
}

2、试编程

具体过程如下:
定义一个基类 Animal，其中有一个虚函数perform()，用于在子类中实现不同的表演行为。

#include <iostream>using namespace std;class Animal
{
private:string name;
public:Animal(){}Animal(string name):name(name){}virtual void perform(){cout << "I am performer!" << endl;}
};class lion:public Animal
{
private:string name;
public:lion(){}lion(string n1,string n2):Animal(n1),name(n2){}void perform(){cout << "I am lion,I am strong!" << endl;}
};class elephant:public Animal
{
private:string name;
public:elephant(){}elephant(string n1,string n2):Animal(n1),name(n2){}void perform(){cout << "I am elephant,Look at my nose!" << endl;}
};int main()
{lion l1("小蒜","小狮子");Animal *p = &l1;p->perform();elephant e1("小蒜","小象");Animal *q = &e1;q->perform();return 0;
}

思维导图