C++：多继承习题1

 题目内容：
    构建people类，包含姓名、性别、年龄、有参构造函数、输出信息；通过people派生出student类，加入学号、成绩、有参构造函数、输出学生信息。在主函数中定义student对象，对其初始化并输出学生信息。

输出样例如图：

代码如下：

#include<iostream>
#include<string>
using namespace std;

class people
{
protected:
	string name;
	string gender;
	int age;

public:
	people(string n, string g, int a) :
		name(n), gender(g), age(a) {}
	void showpeople()
	{
		cout << "姓名: " << name << endl;
		cout << "性别: " << gender << endl;
		cout << "年龄: " << age << endl;
	}
};

class student :public people
{
private:
	string studentId;
	float score;

public:
	student(string sId, float sc, string n = "", string g = "&