example4_copy_constructor.cpp

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#include <iostream>
#include <string>

class Student {
private:
    std::string name;
    int* score;

public:
    // Regular constructor
    Student(const std::string& n, int s) : name(n), score(new int(s)) {
        std::cout << "Regular constructor called" << std::endl;
    }

    // Copy constructor
    Student(const Student& other) : name(other.name), score(new int(*other.score)) {
        std::cout << "Copy constructor called" << std::endl;
    }

    // Destructor
    ~Student() {
        delete score;
    }

    void display() const {
        std::cout << "Name: " << name << ", Score: " << *score << std::endl;
    }

    void setScore(int s) {
        *score = s;
    }
};

int main() {
    Student student1("Bob", 85);
    Student student2 = student1;  // Copy constructor called

    std::cout << "Student 1: ";
    student1.display();
    std::cout << "Student 2: ";
    student2.display();

    student2.setScore(90);

    std::cout << "After changing student2's score:" << std::endl;
    std::cout << "Student 1: ";
    student1.display();
    std::cout << "Student 2: ";
    student2.display();

    return 0;
}