C++ Multiple Inheritance Program

Multiple Inheritance

Program to illustrate Multiple inheritance

Illustration 16.2 Multiple inheritance

The order of inheritance by derived class to inherit the base class is left to right. 

#include <iostream>

using namespace std;

class student //base class 

{  

private :

char name[20];

int rno; 

public:  

void acceptname()  

{ 

cout<<"\n Enter roll no and name .. "; 

cin>>rno>>name;  

} 

void displayname() 

{

cout<<"\n Roll no :-"<<rno; 

cout<<"\n Name :-"<<name<<endl; 

}

};

class detail                     //Base class

{

      int dd,mm,yy;

      char cl[4];

public:

void acceptdob()

{

cout<<"\n Enter date,month,year in digits and class .. ";

cin>>dd>>mm>>yy>>cl;

}

void displaydob()

{

cout<<"\n class:-"<<cl;

cout<<"\t\t DOB          : "<<dd<<” - “<<mm<<” –“ <<yy<<endl;

}

};

class exam : public student,public detail //derived class with multiple

base class

{

      public:

      int mark1, mark2 ,mark3,mark4,mark5,mark6,total;

      void acceptmark()

      {

      cout<<"\n Enter lang,eng,phy,che,csc,mat marks.. ";

      cin>>mark1>>mark2>>mark3>>mark4>>mark5>>mark6;

      }

void displaymark()

{

cout<<"\n\t\t Marks Obtained ";

cout<<"\n Language.. "<<mark1;

cout<<"\n English .. "<<mark2;

cout<<"\n Physics .. "<<mark3;

cout<<"\n Chemistry.. "<<mark4;

cout<<"\n Comp.sci.. "<<mark5;

cout<<"\n Maths ..  "<<mark6;

}

};

int main()

{   

exam e1;    

e1.acceptname();  //calling base class function using derived class object

e1.acceptdob();     //calling base class function using derived class object

e1.acceptmark();  

e1.displayname(); //calling base class function using derived class object

e1.displaydob();   //calling base class function using derived class object

e1.displaymark();

return 0;     

}   

Output:

Enter roll no and name .. 1201 MEENA

Enter date,month,year in digits and class .. 7 12 2001 XII

Enter lang,eng,phy,che,csc,mat marks.. 96 98 100 100 100 100

Roll no :-1201

Name :- MEENA

class   :-XII        DOB          : 7 - 12 -2001

Marks Obtained

Language.. 96

English .. 98

Physics .. 100

Chemistry.. 100

Comp.sci.. 100

Maths ..  100

In the above program the class “exam” is derived from class “student” and “detail” Hence it access all the members of both the classes.