1. 继承基础语法

#include <iostream>
using namespace std;
class Person{
public:
    void speak(){
        cout << "人在说话" << endl;
    }
};
class Student:public Person{
public:
    void speak(){
        cout << "学生在说话" << endl;
    }
};
int main(){
    Student student;
    student.speak();
    return 0;
}