1.

a) Consider an example of declaring the examination result. Design three classes: Student, Exam and Result. The Student class has data members such as those representing registration number, name etc. Create a class Exam by inheriting the student class. The exam class adds data members representing the marks scored in six subjects. Derive class Result from the exam class and it has own data members such as total_marks. Write an interactive program in C++ to model this relationship

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Answer:

#include

using namespace std;

 

#define MAX 10

 

class student

{

   private:

       char  name[30];

       int   ROLLNO;

       int   total;

       float perc;

   public:

       //MEMBER function to get student's details

       void getDetails(void);

       //member function to print student's details

       void putDetails(void);

};

void student::getDetails(void){

   cout << "Enter name: " ;

   cin >> name;

   cout << "Enter ROLL number: ";

   cin >> rollNo;

   cout << "Enter total marks outof 500: ";

   cin >> total;

     

   perc=(float)total/500*100;

}

void student::putDetails(void){

   cout << "Student details:\n";

   cout << "Name:"<< name << ",Roll Number:" << rollNo << ",Total:" << total << ",Percentage:" << perc;

}

 

int main()

{

   student std[MAX];        

   int n,loop;

     

   cout << "Enter total number of students: ";

   cin >> n;

     

   for(loop=0;loop< n; loop++){

       cout << "Enter details of student " << loop+1 << ":\n";

       std[loop].getDetails();

   }

     

   cout << endl;

     

   for(loop=0;loop< n; loop++){

       cout << "Details of student " << (loop+1) << ":\n";

       std[loop].putDetails();

   }

     

   return 0;

}

Explanation:


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