c++语言分别给出如下5个文件：student.h、student.cpp、teacher.h、teacher.cpp和 main.cpp。在正确的位置，添加编译预处理命令；并将它们组织成一个工程， 编译执行。 b) 在Student类中，添加一个私有的静态数据成员count，用于统计学生总数。并 设计相应的静态成员函数showCount，以输出当前学生总数（注意：添加count 成员之后，要编写正确的复制构造函数和

赋值运算符重载函数，以确保count 成员的正确性）。以下是代码示例：

// student.h
#ifndef STUDENT_H
#define STUDENT_H

class Student {
public:
Student();
Student(const Student& other);
~Student();
Student& operator=(const Student& other);

void setName(const char* name);
const char* getName() const;

static void showCount();

private:
char* m_name;
static int s_count;
};

#endif // STUDENT_H

// student.cpp
#include "student.h"

int Student::s_count = 0;

Student::Student() : m_name(nullptr) {
++s_count;
}

Student::Student(const Student& other) : m_name(nullptr) {
setName(other.m_name);
++s_count;
}

Student::~Student() {
delete[] m_name;
--s_count;
}

Student& Student::operator=(const Student& other) {
if (this != &other) {
setName(other.m_name);
}
return *this;
}

void Student::setName(const char* name) {
delete[] m_name;
m_name = new char[strlen(name) + 1];
strcpy(m_name, name);
}

const char* Student::getName() const {
return m_name;
}

void Student::showCount() {
std::cout << "Total number of students: " << s_count << std::endl;
}

// teacher.h
#ifndef TEACHER_H
#define TEACHER_H

class Teacher {
public:
Teacher();
~Teacher();

void setName(const char* name);
const char* getName() const;

private:
char* m_name;
};

#endif // TEACHER_H

// teacher.cpp
#include "teacher.h"

Teacher::Teacher() : m_name(nullptr) {}

Teacher::~Teacher() {
delete[] m_name;
}

void Teacher::setName(const char* name) {
delete[] m_name;
m_name = new char[strlen(name) + 1];
strcpy(m_name, name);
}

const char* Teacher::getName() const {
return m_name;
}

// main.cpp
#include "student.h"
#include "teacher.h"

int main() {
Student s1;
s1.setName("Alice");
Student::showCount();

Student s2(s1);
s2.setName("Bob");
Student::showCount();

Student s3;
s3 = s2;
s3.setName("Charlie");
Student::showCount();

Teacher t1;
t1.setName("Mr. Smith");

std::cout << "Student 1: " << s1.getName() << std::endl;
std::cout << "Student 2: " << s2.getName() << std::endl;
std::cout << "Student 3: " << s3.getName() << std::endl;
std::cout << "Teacher: " << t1.getName() << std::endl;

return 0;
}