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Inheritance Class ...... help needed asap

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raj157

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Inheritance Class ...... help needed asap

Apr 11th, 2007

Well it is an assignment question here is the question :

Implement a base class Person. Derive classes Student and Instructor from Person. A person has
a name and a birthday. A student has a major, and an instructor has a salary. Write the class
definitions, the constructors, and the member functions print() for all classes.

this is what i have got so far any kind of help will be good :

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 c Syntax (Toggle Plain Text) 
#include <iostream>
using namespace std;
 
class Person{
public: 
    Person( string nam, string day);
    string get_name()const;
    string get_date()const; 
    void print()const;
private: 
    string name; 
    string date;
};
 
Person::Person( string nam,string day){
    name= nam;
    date= day;
}
 
string Person::get_name() const 
{
    return name;
}
 
string Person::get_date() const 
{
    return date;
}
 
void Person:: print()const{
    cout<<" Mr/Mrs."<<name<<" was born on "<<date<<"\n";}
 
int main (){
    string nam1;
    string dat1;
    cout<< " Please enter the name of student  \n";
    cin>>nam1;
    cout<< " Please enter the date of birth in the format dd/mm/yyyy \n";
    cin>>dat1;
    Person(nam1,dat1);
    return 0;
}
#include <iostream>
using namespace std;

class Person{
public: 
    Person( string nam, string day);
    string get_name()const;
    string get_date()const; 
    void print()const;
private: 
    string name; 
    string date;
};

Person::Person( string nam,string day){
    name= nam;
    date= day;
}

string Person::get_name() const 
{
    return name;
}

string Person::get_date() const 
{
    return date;
}

void Person:: print()const{
    cout<<" Mr/Mrs."<<name<<" was born on "<<date<<"\n";}

int main (){
    string nam1;
    string dat1;
    cout<< " Please enter the name of student  \n";
    cin>>nam1;
    cout<< " Please enter the date of birth in the format dd/mm/yyyy \n";
    cin>>dat1;
    Person(nam1,dat1);
    return 0;
}

Well i have managed to get the base class person but it gives error can someone help me out with whats wrong and how to implement the other required derived class student and instructor

Last edited by Ancient Dragon; Apr 11th, 2007 at 8:45 am. Reason: correct code tags and reformat code so it can be read

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Re: Inheritance Class ...... help needed asap

Apr 11th, 2007

First learn how to properly format your programs. I helped you out this time by doing it for you just so you can see how it should be done. There is absolutely nothing wrong with being generous with spaces and line feeds -- makes your program a lot easier to read.

>> it gives error
what error? I suspect it might be because you did not include <string> header file.

>>and how to implement the other required derived class student and instructor
here is how to declare Student. Other derived classes are the same format.

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class Student : public Person
{
   // your code here
};
class Student : public Person
{
   // your code here
};

Last edited by Ancient Dragon; Apr 11th, 2007 at 8:50 am.

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raj157

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Re: Inheritance Class ...... help needed asap

Apr 11th, 2007

well i did tht ... still does not work .. gives error of one or multiple defined symbols found .....

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Re: Inheritance Class ...... help needed asap

Apr 11th, 2007

post code please.

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Re: Inheritance Class ...... help needed asap

Apr 11th, 2007

#include <iostream>

#include <string>

using namespace std;



class Person{

    public: 

        Person( string nam, string day);

        string get_name()const;

        string get_date()const;

        void print()const;

    private:

        string name; 

        string date;

};



Person:erson( string nam,string day){

    name= nam;

    date= day;

}



string Person::get_name() const {return name;}

string Person::get_date() const {return date;}



void Person:: print()const{

    cout<<" Mr/Mrs."<<name<<" was born on "<<date<<"\n";}



int main (){

    string nam1;string dat1;

    cout<< " Please enter the name of student  \n";

    cin>>nam1;

    cout<< " Please enter the date of birth in the format dd/mm/yyyy \n";

    cin>>dat1;

    Person(nam1,dat1);

    return 0;

}

Last edited by raj157; Apr 11th, 2007 at 12:43 pm.

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Re: Inheritance Class ...... help needed asap

Apr 11th, 2007

well i got it running but now i cant get it to print the output .. can anyone help me asap... thanks

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Re: Inheritance Class ...... help needed asap

Apr 11th, 2007

You need to call the print function after creating the object. Something along the lines of obj.print().

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Re: Inheritance Class ...... help needed asap

Apr 11th, 2007

dint learn yet about object.print ... have only learned about the print in the class like i have done in my code.

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Re: Inheritance Class ...... help needed asap

Apr 11th, 2007

I meant, do something like:

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Person obj(nam1, dat1);
obj.print();  // call the member function print
Person obj(nam1, dat1);
obj.print();  // call the member function print