C++ Single Inheritance Program

Single Inheritance

Illustration 16.1 single inheritance

Though  the  derived  class  inherits all the members of base class ,it has access privilege only to non-private members of the base class .

# 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 exam : public student      //derived class with single 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.acceptmark();

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

e1.displaymark();

return 0;

}

Output

Enter roll no and name .. 1201 KANNAN

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

Roll no :-1201

Name :-KANNAN

Marks Obtained

Language.. 100

English .. 100

Physics .. 100

Chemistry.. 100

Comp.sci.. 100

Maths ..  100

In the above program the derived class “exam” inherits all the members of the base class “student”. But it has access privilege only to the non private members of the base class.