思维导图

练习题

1>定义一个基类 Animal，其中有一个虛函数perform（)，用于在子类中实现不同的表演行为。

#include <iostream>using namespace std;class Animal
{
public:virtual void perform() {cout << "这是一个动物，但没有具体的表演" << endl;}
};class Lion:public Animal
{
public:void perform(){cout << "狮子正在叫！" << endl;}
};class Elephant:public Animal
{
public:void perform(){cout << "大象正在摇动长长的鼻子！" << endl;}
};class Monkey : public Animal
{
public:void perform(){cout << "猴子正在吃香蕉！" << endl;}
};int main() {Lion lion;Elephant elephant;Monkey monkey;Animal *animal1 = &lion;Animal *animal2 = &elephant;Animal *animal3 = &monkey;animal1->perform();animal2->perform();animal3->perform();return 0;
}