4th sem OOPC Write the following programs using INHERITANCE in CPP language.

1.      To enter and display the student data using single inheritance technique.


#include<iostream>
#include<conio.h>

using namespace std;

class student{

public:
    int roll_no;
    char name[20];

    void get(){
        cout<<"\nEnter Student name: ";
        cin>>name;
        cout<<"Enter Student Roll No: ";
        cin>>roll_no;

    }
};

class subject:public student{

public:
    char sub1[10],sub2[10],sub3[10];
        void getsub(){
            cout<<"Enter first subject: ";
            cin>>sub1;
            cout<<"Enter Second subject: ";
            cin>>sub2;
            cout<<"Enter Third subject: ";
            cin>>sub3;
            }

};
class school:public subject{
    public:
    void display(){
            cout<<"\nRoll No: "<<roll_no<<"\nName: "<<name<<"\nSubject 1:"<<sub1<<"\nSubject 2:"<<sub2<<"\nSubject 3:"<<sub3<<endl;

            }
};
int main(){
    int i,n;
    school s[10];
    cout<<"\nEnter the number of student want to enter :";
    cin>>n;
    for(i=0;i<n;i++){
        s[i].get();
        s[i].getsub();
    }
    cout<<"\n\nStudent Details:-"<<endl;
    for(i=0;i<n;i++){
        s[i].display();
    }
    return 0;
}

2.      Write a program to enter the information of an employee and then display it using the single inheritance concept (one base class and one derived class).

#include<iostream>

#include<conio.h>

using namespace std;

class student{

public:

    int roll_no;

    char name[20];

    void get(){

        cout<<"\nEnter Student name: ";

        cin>>name;

        cout<<"Enter Student Roll No: ";

        cin>>roll_no;

    }

};

class subject:public student{

public:

    char sub1[10],sub2[10],sub3[10];

        void getsub(){

            cout<<"Enter first subject: ";

            cin>>sub1;

            cout<<"Enter Second subject: ";

            cin>>sub2;

            cout<<"Enter Third subject: ";

            cin>>sub3;

            }

        void display(){

            cout<<"\nRoll No: "<<roll_no<<"\nName: "<<name<<"\nSubject 1:"<<sub1<<"\nSubject 2:"<<sub2<<"\nSubject 3:"<<sub3<<endl;

            }

};

int main(){

    int i,n;

    subject s[10];

    cout<<"\nEnter the number of student want to enter :";

    cin>>n;

    for(i=0;i<n;i++){

        s[i].get();

        s[i].getsub();

    }

    cout<<"\n\nStudent Details:-"<<endl;

    for(i=0;i<n;i++){

        s[i].display();

    }

    return 0;

}

3.      Write a program to enter the information of n number of student and then display it using the multilevel inheritance concept.

#include<iostream>
#include<conio.h> using namespace std; class student_year{
public:
int en_da;
int ex_da;
void getyear(){
cout<<"Enter data of Enter school:";
cin>>en_da;
cout<<"Enter the date the person leave school:";
cin>>ex_da;
} }; class student_sub{
public:
char sub1[50],sub2[50],sub3[50];
void getsub(){
cout<<"Enter first subject: ";
cin>>sub1;
cout<<"Enter Second subject: ";
cin>>sub2;
cout<<"Enter Third subject: ";
cin>>sub3;
}
};
class student_info : public student_year, public student_sub{ public:
int roll_no;
char name[50];
void getinfo(){
cout<<"\nEnter Student name: ";
cin>>name;
cout<<"Enter Student Roll No: ";
cin>>roll_no;
}
void display(){
cout<<"\nRoll No: "<<roll_no<<"\nName: "<<name<<"\nSubject 1:"<<sub1<<"\nSubject 2:"<<sub2<<"\nSubject 3:"<<sub3<<"Admision Date:"<<en_da<<"Leaving Date"<<ex_da<<endl;
} }; int main(){
int i,n; cout<<"\nEnter the number of student want to enter :";
cin>>n;
student_info s[n];
for(i=0;i<n;i++){
s[i].getinfo();
s[i].getsub();
s[i].getyear();
}
cout<<"\n\nStudent Details:-"<<endl;
for(i=0;i<n;i++){
s[i].display();
cout<<endl;
}
return 0;
}