方法

• 其中一个类的hpp，cpp都正常写，也就是hpp引用另一个类，cpp引用自己的hpp

• 另一个类，hpp中声明关联类，cpp中引用关联类

示例

/* Teacher.hpp */#ifndef Teacher_hpp#define Teacher_hpp#include 
    
     #include "Student.hpp"class Teacher {public:    Student * students;};#endif /* Teacher_hpp */
    

/* Teacher.cpp */#include "Teacher.hpp"

/* Student.hpp */#ifndef Student_hpp#define Student_hpp#include 
    
     //#include "Teacher.hpp"class Teacher;class Student {public:    int number;    Teacher * teacher;    Teacher * getTeacher();};#endif /* Student_hpp */
    

/* Student.cpp */#include "Teacher.hpp" // 只需要导入关联类的头文件，因为里面包含Student.hpp//#include "Student.hpp"Teacher * Student::getTeacher() {    return teacher;}

/* main.cpp */#include 
    
     #include 
     
      #include "Teacher.hpp"#include "Student.hpp"using namespace std;int main() {    // 随便做点儿什么    Teacher teacher;    Student students[10];    teacher.students = students;        for (int i = 0; i < sizeof(students) / sizeof(Student); i++) {        teacher.students[i].number = i;        teacher.students[i].teacher = &teacher;        cout << i << endl;    }        cout << sizeof(students) << endl;    return 0;}