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

Virtual Functions

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449 Discussions

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  • jeetmallick61111
     + 0 comments
    // class Person --> Main class 
class Person {
    public :
    int age;
    string name;
    virtual void getdata()=0;   // actually pure virtual functions 
    virtual void putdata() =0;  
};
// class Professor
class Professor: public Person{
    public :
    int publications;
   static int cur_id;   // 
   int temp_id;    // for storing cur_id and assigning it then ++ 
    //constructor to ++ the cur id
    Professor(){temp_id=++cur_id; }
    void getdata();
    void putdata();
};
int Professor::cur_id=0;

// basically check the input and output and try to understan what's going on , then you can understand that " 1/2 is for either professor/student , but in o/p cur_id will also 1/2 is for because we have to initialize a static var. for each class starting from 0 ,  and will be ++ as per input -----> for all this we have to use a constructor which will automatically ++ that , if that class object is created . "

void Professor::getdata(){
    cin>>name>>age>>publications;
}

// 
void Professor::putdata(){
    cout<<name<<" "<<age<<" "<<publications<<" "<<temp_id<<endl;
}

// NOW STUDENT CLASS
class Student: public Person{
    public :
    int marks[6];
    static int cur_id;
    int temp_id;
    // same explanation check upper 
    Student(){
        temp_id=++cur_id;
    }
    
    void getdata();
    void putdata(); 
};

int Student::cur_id=0;
// 
void Student::getdata(){
    //cout<<"taking";
    cin>>name>>age;
    for(int i=0;i<6;i++){
        cin>>marks[i];
    } 
}

// 
void Student :: putdata(){
     int total_sum=0;
     for(int i=0;i<6;i++){
        total_sum=total_sum+marks[i];
     }
     cout<<name<<" "<<age<<" "<<total_sum<<" "<<temp_id<<endl;
    
}

  • mubarakabdul067
     + 0 comments

    class Person { public: virtual void getdata() = 0; virtual void putdata() = 0;

    protected:
string name{};
int age{};

    };

    class Professor : public Person {

    private: int publications{}; static int prof_seq_id; int prof_cur_id{};

    public: Professor() :prof_cur_id {prof_seq_id} { prof_seq_id++; }

    void getdata() override { cin >> name; cin >> age; cin >> publications; }

    void putdata() override { cout << name << " " << age << " " << publications << " " << prof_cur_id << endl; }

    };

    int Professor::prof_seq_id = 1;

    class Student : public Person {

    private: vector marks; int stud_cur_id {}; int sum; static int stud_seq_id;

    public:
Student()
:stud_cur_id{stud_seq_id}
{
   stud_seq_id++;
}

void getdata() override
{
   cin >> name;
   cin >> age;

   int num;
   for(int i = 0; i < 6; i++)
   {
    cin >> num;
    marks.emplace_back(num);
   }   
}

void putdata() override
{
    sum = accumulate(marks.begin(), marks.end(), 0);
    cout << name << " " << age << " " << sum << " " << stud_cur_id << endl;
}

    };

    int Student::stud_seq_id = 1;

  • tanujbisht
     + 0 comments
    //used static variables to track professors and studentents seprately
static int count_professor = 0 , count_student = 0;

class Person{
    protected:
        string name;
        int age , cur_id;
    public:
        virtual void getdata() = 0;
        virtual void putdata() = 0;
};

class Professor : public Person{
    private:
        int publications;
    public:
        void getdata(){
            cin>>name;
            cin>>age;
            cin>>publications;
            cur_id = ++(::count_professor);
        }
        void putdata(){
            cout<<name<<" "<<age<<" "<<publications<<" "<<cur_id<<endl;
        }
};
class Student : public Person{
    private:
        int marks;
    public:
        void getdata(){
            cin>>name;
            cin>>age;
            int temp;
            marks = 0;
            for(int i = 0; i < 6;i++){   
                cin>>temp;
                marks += temp;
            }
            cur_id = ++(::count_student);
        }
        void putdata(){
            cout<<name<<" "<<age<<" "<<marks<<" "<<cur_id<<endl;
        }
};

  • manjunathad516
     + 0 comments

    class Person {

    public: string name; int age;

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

virtual ~Person() = default;

    };

    class Professor: public Person {

    int publication; static int cur_id;

    public:
void getdata() override
{
    cin >> name >> age >> publication;
}
void putdata() override
{
    cout << name <<" "<< age << " "<< publication << " " << ++cur_id <<endl;
}

    };

    class Student:public Person {

    int marks[6]; static int cur_id;

    public:
void getdata() override
{
    cin >> name >> age;
    for(int i = 0; i < 6; i++)
        {
            cin >> marks[i];
        }
}

void putdata() override
{
int total = 0;
    for(int i = 0; i < 6; i++)
    {
        total +=marks[i];
    }
    cout<<name <<" "<<age<<" " << total << " " << ++cur_id << endl;
}

    };

    int Professor::cur_id = 0; int Student::cur_id = 0;

  • manjunathad516
     + 0 comments

    class Person { public: string name; int age;

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

virtual ~Person() = default;

    };

    class Professor: public Person { int publication; static int cur_id;

    public:
void getdata() override
{
    cin >> name >> age >> publication;
}
void putdata() override
{
    cout << name <<" "<< age << " "<< publication << " " << ++cur_id <<endl;
}

    };

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

    public:
void getdata() override
{
    cin >> name >> age;
    for(int i = 0; i < 6; i++)
        {
            cin >> marks[i];
        }
}

void putdata() override
{
    int total = 0;
    for(int i = 0; i < 6; i++)
    {
        total +=marks[i];
    }
    cout<<name <<" "<<age<<" " << total << " " << ++cur_id << endl;
}

    };

    int Professor::cur_id = 0; int Student::cur_id = 0;