Definition: -
                               A class derived from only one base class is called Single inheritance.



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

class A
{
    public:
    void showA()
    {
        cout<<"This is class A";
    }
};
class B:public A
{
    public:
    void showB()
    {
        cout<<"\nThis is class B";
    }
};
void main()
{
    B B1;
    clrscr();
    B1.showA();
    B1.showB();
    getch();
}

OUTPUT:

This is class A
This is class B