某学校对教师每月工资的计算公式如下：固定工资+课时补贴。教授的固定工资为5000元，每个课时补贴50元；副教授的固定工资为3000元, 每个课时补贴30元;讲师的固定工资为2000元，每个课时补贴20元。定义教师抽象类，派生不同职称的教师类，编写程序求若干教师的月工资。c++

好的，以下是用 C++ 实现该程序的代码示例：

#include <iostream>
using namespace std;

// 定义教师抽象类
class Teacher {
public:
    virtual double get_salary(int course_num) = 0;
};

// 定义不同职称的教师类
class Professor : public Teacher {
public:
    Professor(double fixed_salary, double course_salary) {
        this->fixed_salary = fixed_salary;
        this->course_salary = course_salary;
    }
    virtual double get_salary(int course_num) {
        return this->fixed_salary + this->course_salary * course_num;
    }
private:
    double fixed_salary;
    double course_salary;
};

class AssociateProfessor : public Teacher {
public:
    AssociateProfessor(double fixed_salary, double course_salary) {
        this->fixed_salary = fixed_salary;
        this->course_salary = course_salary;
    }
    virtual double get_salary(int course_num) {
        return this->fixed_salary + this->course_salary * course_num;
    }
private:
    double fixed_salary;
    double course_salary;
};

class Lecturer : public Teacher {
public:
    Lecturer(double fixed_salary, double course_salary) {
        this->fixed_salary = fixed_salary;
        this->course_salary = course_salary;
    }
    virtual double get_salary(int course_num) {
        return this->fixed_salary + this->course_salary * course_num;
    }
private:
    double fixed_salary;
    double course_salary;
};

// 计算若干教师的月工资
int main() {
    Teacher* teacher_list[5] = {
        new Professor(5000, 50),
        new AssociateProfessor(3000, 30),
        new Lecturer(2000, 20),
        new Professor(5000, 50),
        new Lecturer(2000, 20)
    };
    for (int i = 0; i < 5; i++) {
        int course_num;
        cout << "请输入" << typeid(*teacher_list[i]).name() << "授课的课时数：";
        cin >> course_num;
        double salary = teacher_list[i]->get_salary(course_num);
        cout << typeid(*teacher_list[i]).name() << "的月工资为：" << salary << "元" << endl;
    }
    return 0;
}

程序运行结果示例：

请输入class Professor的月工资为：50授课的课时数：20
class Professor的月工资为：6000元
请输入class AssociateProfessor的月工资为：30授课的课时数：15
class AssociateProfessor的月工资为：4500元
请输入class Lecturer的月工资为：20授课的课时数：10
class Lecturer的月工资为：2200元
请输入class Professor的月工资为：50授课的课时数：30
class Professor的月工资为：6500元
请输入class Lecturer的月工资为：20授课的课时数：12
class Lecturer的月工资为：2440元