How can I add polymorphism to this program?

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Hi, i've got a prgram for a college system which allows a user to determine the overall grades for a student. What I want to do is add polymorphism to this program, but im sure how I could? the program uses a base class and a derived class.

Heres the code for main:

#include "HNDStudent.h"
#include "NatdipStudent.h"

int main(int argc, char *argv[])
{
    string sname, sQT,g;
    double sID;
    char si;
    int sQL,sY;
        
    HNDstudent s2009("x", 'x', 000, 0, "x", 0, "incomplete");
    
    s2009.Set_surname(sname);
    s2009.Set_initial(si);
    s2009.Set_ID(sID);
    s2009.Set_level(sQL);
    s2009.Set_qual_title(sQT);
    s2009.Set_year(sY);
    s2009.Set_grade(g);
    
   
   cout<<s2009.Get_surname()<<endl; //inherited functions 
   cout<<s2009.Get_initial()<<endl;;
   cout<<s2009.Get_ID()<<endl;;
   cout<<s2009.Get_level()<<endl;;
   cout<<s2009.Get_qual_title()<<endl;;
   cout<<s2009.Get_year()<<endl;
   cout<<s2009.Get_grade()<<endl;
       
   
    
    system("PAUSE");
    return EXIT_SUCCESS;
}

Posted 6-Apr-11 6:03am

programmer1234

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3 solutions

Solution 2

This is a homework assignment, so I'm not going to just give you the answer. I will however give you some guidance.

You have to know what polymorphism is before you can expect to be able to implement it. Since you said you're not sure how you could implement it in the specified code, I assume you don't know what it is.

After having told you that, I assume that your instructor gave you his definition of "polymorphism" (there are several different categories of polymorphism), but my guess is that he's talking about subtype (or inclusion) polymorphism.

Google is your friend.

Posted 6-Apr-11 6:38am

#realJSOP

Comments

Sergey Alexandrovich Kryukov 6-Apr-11 13:02pm

Good points, a 5.
--SA

Solution 3

Your program is already using polymorphism - just work your way through the workings of ios :)

cout<<s2009.Get_surname()<<endl;

Regards
Espen Harlinn

Posted 6-Apr-11 11:05am

Espen Harlinn

Comments

Sergey Alexandrovich Kryukov 7-Apr-11 0:54am

He he he... and hard to argue against that! My 5.
--SA

Espen Harlinn 8-Apr-11 3:42am

Thanks, SAKryukov :)

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Sergey Alexandrovich Kryukov · Accepted Answer · 2011-04-06T06:35:00

Polymorphism is a tool, not a purpose. You cannot "add" it as a condiment. Is it only because somebody assigned you to do so?

You probably don't have even a remote idea of what you are talking about, otherwise you wound know that there is no polymorphism without classes (you use one and don't show any code of any and don't explain the purpose of any class); you would also understand that "inherited" and "polymorphism" make no sense if you use only one class.

So, it does not matter what kind of answer you will get here: it won't help you, because you hardly will be able to understand them. You need education, not answers. And it's well beyond of the CodeProject format to educate you. Read books, search Web and do elementary exercise. It will take considerable time. After you know the very basics, you will be able to get some help through Questions-and-Answers.

Sorry,

—SA