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  1. Prepare
  2. C++
  3. Classes
  4. Virtual Functions
  5. Discussions

Virtual Functions

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447 Discussions

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  • tessietengan
     + 0 comments

    It pushes you to think about polymorphism, inheritance, and how base class pointers interact with derived class objects. Playwin567

  • scriptinghope
     + 0 comments
    #include <cmath>
#include <cstdio>
#include <vector>
#include <iostream>
#include <algorithm>
using namespace std;
class Person{
protected:
    string name;
    int age;
public:
    Person(){
        
    }
    virtual void getdata()=0;
    virtual void putdata()=0;
};
class Professor : public Person{
    int publications;
    static int cur_id;
public:
    Professor(){
        
    }
    void getdata(){
        cin >> name >> age >>publications;
    }
    void putdata(){
        cout << name <<" "<< age <<" "<<publications<<" "<<++cur_id<<endl;
    }
};
int Professor::cur_id=0;
class Student : public Person{
    int marks[6];
    int sum;
    static int cur_id;
    
public:
    Student(){
        sum =0;
    }
    void getdata(){
        cin >> name >> age ;
        for(int i =0;i<6;i++){
            cin >> marks[i];
        }
    }
    void putdata(){
        for(int i =0 ;i<6;i++){
            sum += marks[i];
        }
        cout << name << " " << age << " "<<sum << " "<<++cur_id<<endl;
    }
};
int Student::cur_id=0;
int main(){

    int n, val;
    cin>>n; //The number of objects that is going to be created.
    Person *per[n];

    for(int i = 0;i < n;i++){

        cin>>val;
        if(val == 1){
            // If val is 1 current object is of type Professor
            per[i] = new Professor;

        }
        else per[i] = new Student; // Else the current object is of type Student

        per[i]->getdata(); // Get the data from the user.

    }

    for(int i=0;i<n;i++)
        per[i]->putdata(); // Print the required output for each object.

    return 0;

}

  • padmalathalaksh1
     + 0 comments

    Is my approach or design following best practices? ` class Person{ string name; int age; public: virtual void getdata(){ cin>>name>>age;

    }
virtual void putdata(){
    cout<<name<<" "<<age<<" ";
}

virtual ~Person(){}

    };

    class Professor: public Person{ int publications; static int cur_id; int id;

    public:
Professor(){
    id = ++cur_id;
}

void getdata() override{   
    Person::getdata();     
    cin>>publications;

}

void putdata() override{
    // Need to output properly
    Person::putdata();
    cout<<publications<<" "<<id<<endl;        
}

    }; int Professor::cur_id = 0;

    class Student: public Person{ int marks[6]; static int cur_id; int id;

    public:
Student(){
    id = ++cur_id;       
} 
void getdata() override{
    Person::getdata();
    for(int i = 0;i<6;i++){
        cin>>marks[i];
    }
}

void putdata() override{
    Person::putdata();
    int totalSum = 0;
    for(int i = 0;i<6;i++){
        totalSum += marks[i];            
    }
    cout<<totalSum<<" "<<id<<endl;
}

    }; int Student::cur_id = 0; `

  • dangis_bakutis
     + 0 comments
    #include <cmath>
#include <cstdio>
#include <vector>
#include <iostream>
#include <algorithm>
using namespace std;

class Person
{
protected:
    int m_cur_id;
    string m_name;
    int m_age;

public:
    virtual void getdata() = 0;
    virtual void putdata() = 0;
};

class Professor : public Person
{
private:
    int m_publications;
    static int id_tracker;

public:
    Professor()
    {
        m_cur_id = ++id_tracker;
    }
    void getdata() override
    {
        cin >> m_name;
        cin >> m_age;
        cin >> m_publications;
    }
    void putdata() override
    {
        cout << m_name << " "
             << m_age << " "
             << m_publications << " "
             << m_cur_id << endl;
    }
};

int Professor::id_tracker = 0;

class Student : public Person
{
private:
    int m_marks[6];
    static int id_tracker;

private:
    int sumOfMarks()
    {
        int sum = 0;
        for (int i = 0; i < 6; i++)
            sum += m_marks[i];
        return sum;
    }

public:
    Student()
    {
        m_cur_id = ++id_tracker;
    }
    void getdata() override
    {
        cin >> m_name;
        cin >> m_age;
        for (int i = 0; i < 6; i++)
        {
            int mark;
            cin >> mark;
            m_marks[i] = mark;
        }
    }
    void putdata() override
    {
        cout << m_name << " "
             << m_age << " "
             << sumOfMarks() << " "
             << m_cur_id << endl;
    }
};

int Student::id_tracker = 0;

int main(){

    int n, val;
    cin>>n; //The number of objects that is going to be created.
    Person *per[n];

    for(int i = 0;i < n;i++){

        cin>>val;
        if(val == 1){
            // If val is 1 current object is of type Professor
            per[i] = new Professor;

        }
        else per[i] = new Student; // Else the current object is of type Student

        per[i]->getdata(); // Get the data from the user.

    }

    for(int i=0;i<n;i++)
        per[i]->putdata(); // Print the required output for each object.

    return 0;

}

  • yashdeora98294
     + 0 comments

    Here is Virtual Functions problem solution in C++ - https://programmingoneonone.com/hackerrank-virtual-functions-solution-in-cpp.html