C++ code for Hybrid Inheritance

Here’s a C++ program that shows how a Research Scholar can inherit from both Student and Teacher, and how virtual inheritance solves the diamond problem:

#include <iostream>
using namespace std;

// Base class
class Person {
public:
    void introduce() {
        cout << "I am a person." << endl;
    }
};

// Derived class Student (virtual inheritance)
class Student : virtual public Person {
public:
    void study() {
        cout << "I am studying." << endl;
    }
};

// Derived class Teacher (virtual inheritance)
class Teacher : virtual public Person {
public:
    void teach() {
        cout << "I am teaching." << endl;
    }
};

// Derived class ResearchScholar (inherits from both Student and Teacher)
class ResearchScholar : public Student, public Teacher {
public:
    void research() {
        cout << "I am doing research." << endl;
    }
};

int main() {
    ResearchScholar rs;
    rs.introduce();   // From Person (diamond problem solved by virtual inheritance)
    rs.study();       // From Student
    rs.teach();       // From Teacher
    rs.research();    // Own method

    return 0;
}

Output

I am a person.
I am studying.
I am teaching.
I am doing research.

Short Explanation

• Person is the base class.

• Both Student and Teacher inherit from Person.

• ResearchScholar inherits from both Student and Teacher.

• Without virtual inheritance, ResearchScholar would get two copies of Person, causing the diamond problem (ambiguity in calling introduce()).

• Using virtual public Person, only one shared copy of Person exists, solving the issue.

Real-life analogy: A Research Scholar is both a Student and a Teacher, but still only one Person.

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