4.23

include <iostream>

using namespace std;

#include"time_user.h"

class student

{

public:

    void display();

public:

    int num;

    string name;

    char sex;

};

void student::display()

{

    cout << "num: " << num << endl;

    cout << "name: " << name << endl;

    cout << "sex: " << sex << endl;

}

int main()

{

    student stl1;

    stl1.name = "gyg";

    stl1.num = 1001;

    stl1.sex = 'm';

    stl1.display();

}

实验二

#include <iostream>

using namespace std;

#include"time_user.h"

class student

{

private:

    int age;

    string name;

public:

    void input(int a, string str)

    {

        age = a;

        name = str;

    }

    void output()

    {

        cout << "name: " << name << endl;

        cout << "age: " << age << endl;

    }

};

int main()

{

    student s[3];

    s[0].input(18, "gyg");

    s[1].input(19, "guo");

    s[2].input(20, "zy");

    for (int i = 0; i < 3; i++)

    {

        s[i].output();

    }