定义一个基类有姓名、性别、年龄,再由基类派生出教师类和学生类。教师类增加工号、职称和工资,学生类增加学号、班级、专业和入学成绩。 编程要求: 1、设计虚函数输出教师和学生的基本信息; 2、计算教师的平均工资并输出; 3、使用友元函数重载运算符“<”,找出入学成绩最高的学生并输出;
时间: 2024-01-25 17:03:32 浏览: 70
好的,根据你的要求,我为你编写了以下的 C++ 代码实现:
```cpp
#include <iostream>
#include <string>
#include <vector>
#include <algorithm>
using namespace std;
class Person {
protected:
string name;
string gender;
int age;
public:
Person(string n, string g, int a) {
name = n;
gender = g;
age = a;
}
virtual void info() {
cout << "Name: " << name << endl;
cout << "Gender: " << gender << endl;
cout << "Age: " << age << endl;
}
};
class Teacher: public Person {
private:
int id;
string title;
double salary;
static vector<Teacher*> teachers;
public:
Teacher(string n, string g, int a, int i, string t, double s): Person(n, g, a) {
id = i;
title = t;
salary = s;
teachers.push_back(this);
}
void info() {
Person::info();
cout << "ID: " << id << endl;
cout << "Title: " << title << endl;
cout << "Salary: " << salary << endl;
}
static double getAverageSalary() {
double sum = 0.0;
for (auto t : teachers) {
sum += t->salary;
}
return sum / teachers.size();
}
};
vector<Teacher*> Teacher::teachers;
class Student: public Person {
private:
string sid;
string cls;
string major;
double score;
friend bool operator<(const Student& lhs, const Student& rhs); // 友元函数声明
public:
Student(string n, string g, int a, string id, string c, string m, double s): Person(n, g, a) {
sid = id;
cls = c;
major = m;
score = s;
}
void info() {
Person::info();
cout << "SID: " << sid << endl;
cout << "Class: " << cls << endl;
cout << "Major: " << major << endl;
cout << "Score: " << score << endl;
}
};
bool operator<(const Student& lhs, const Student& rhs) {
return lhs.score < rhs.score;
}
int main() {
Teacher t1("Tom", "Male", 40, 1001, "Professor", 8000.0);
Teacher t2("Jane", "Female", 35, 1002, "Associate Professor", 6000.0);
Student s1("Mike", "Male", 20, "202101", "Class 1", "Computer Science", 90.0);
Student s2("Alice", "Female", 19, "202102", "Class 2", "Mathematics", 95.0);
Student s3("Bob", "Male", 21, "202103", "Class 3", "Physics", 80.0);
cout << "Teachers' Information:" << endl;
t1.info();
cout << endl;
t2.info();
cout << endl;
cout << "Students' Information:" << endl;
s1.info();
cout << endl;
s2.info();
cout << endl;
s3.info();
cout << endl;
cout << "The Average Salary of Teachers is: " << Teacher::getAverageSalary() << endl;
sort(vector<Student>{s1, s2, s3}.begin(), vector<Student>{s1, s2, s3}.end()); // 使用友元函数重载运算符“<”排序
cout << "The Student with the Highest Score is: " << endl;
vector<Student>{s1, s2, s3}.back().info();
return 0;
}
```
这个程序首先定义了一个基类 `Person`,包含了姓名、性别和年龄三个属性,并且定义了一个虚函数 `info()`,用于输出对象的基本信息。
接下来,从 `Person` 中派生出了两个类 `Teacher` 和 `Student`。其中,`Teacher` 类增加了工号、职称和工资三个属性,并且使用了一个静态变量 `teachers` 记录了所有的教师对象,以便于计算平均工资。`Student` 类增加了学号、班级、专业和入学成绩四个属性,并且声明了一个友元函数 `operator<`,用于比较两个学生对象的入学成绩大小。
在 `main()` 函数中,我们创建了两个教师对象和三个学生对象,并且输出了它们的基本信息。接着,我们调用了 `Teacher::getAverageSalary()` 静态函数,计算出了教师的平均工资,并输出了这个结果。最后,我们使用了 `sort()` 函数,传入了一个 `vector` 对象,其中包含了三个学生对象,并且使用了 `operator<` 函数重载运算符 `<`,排序后输出了入学成绩最高的那个学生的基本信息。
阅读全文