Multiple inheritances.

Introduction to Multiple Inheritance in Object-Oriented Programming: 

Very often situations may arise in which a class has to derive features from more than one class. Multiple inheritances facilitate a class to inherit features from more than one class. The derived class can access two or more classes and can add properties of its own.

Write a program to explain multiple inheritances.

Algorithm:

step1: Take three classes student, employee, manager

step2: within a student, class Enter name and school, college data with the help of getdata() function and display this data using putdata() function.

step3: within the employee, class Enter and display company, age data with the help of getdata(),putdata() functions.

step4: within the manager class extends student and employee classes and using data and their functions to the manager class and Enter & display designation, salary of the manager using putdata(),getdata() functions

step5: within the main function create instance of manager class 'm' and call getdata() and putdata() functions.

Program implementation:

#include<iostream.h>

#include<conio.h>

const int MAX=50;

class student

{

private:

char name[MAX];

char school[MAX];

char college[MAX];

public:

void getdata()

{

cout<<”\n \t Enter name :”;

cin>>name;

cout<<”\t Enter school name:”;

cin>school;

cout<<”\n \t Enter College name:”;

cin>>college;

}

void putdata()

{

cout<<”\n \t Name :”<<name;

cout<<”\n \t School Name :”<<school;

cout<<”\n \t College Name :”<<college;

}

};

class employee

{

private

char company[MAX];

int age;

public :

void getdata()

{

cout<<”\n \t Enter the company name :”;

cin>>company;

cout<<”\n \t Enter age:”;

cin>>age;

}

void putdata()

{

cout<<”\n \t Company Name :”<<company;

cout<<”\t Age:”<<age;

}

};

class manager : private employee,private student

{

private:

char design[MAX];

float salary;

public :

void getdata()

{

student ::getdata();

employee ::getdata();

cout<<”\n \t Enter your Designation :”;

cin>>design;

cout<<”\n \t Enter salary:”;

cin>>salary;

}

void putdata()

{

Student ::putdata();

Employee::putdata();

cout<<”\n \t Designation :”<<design;

cout<<”\n \t Salary :“<<salary;

}

};

void main(0

{

manager m;

clrscr();

cout<<”\n Enter data for manager:”<<endl;

m.gatdata();

cout<<”\n The data for manager is :”<<endl;

m.putdata();

}

The output of the above program is:

Enter data for manager :

Enter name : Ram

Enter name of school: GMSS

Enter name of college :GCET

Enter name of company :CMC

Enter age :24

Enter designation :Analyst

Enter salary :10000

The data for manager is

Student Name :Ram

School Name :GMSS

College Name :GCET

Company Name :CMC

Age :24

Designation :Analyst

Salary:10000

Thanks

Mukesh Rajput