Single Inheritance In C++

The inheritance in which a derived class is inherited from only one base class is known as single inheritance. The single inheritance in c++ is simple and very easy to understand.

Where ‘A’ is the base class, and ‘B’ is the derived class.

Single Level Inheritance Example In C++ By Inheriting Fields

Single level inheritance occurs when one class inherits from another. Consider the case of single-level inheritance, which simply inherits fields.

#include <iostream>  
using namespace std;  
 class Account 
 {  
   public:  
   float salary = 70000;   
 };  
 class Programmer: public Account
 {  
   public:  
   float bonus = 6000;    
 };       
int main(void) 
{  
     Programmer p1;  
     cout<<"Salary: "<<p1.salary<<endl;    
     cout<<"Bonus: "<<p1.bonus<<endl;    
    return 0;  
}  

Output:

Salary: 70000
Bonus: 6000

The Employee is the base class in this example, while the Programmer is the derived class.

Single Level Inheritance Example In C++: Inheriting Methods

Let’s look at another C++ inheritance example where just methods are passed down.

#include <iostream>  
using namespace std;  
 class Animal {  
   public:  
 void eat() {   
    cout<<"The Dog is Eating."<<endl;   
 }    
   };  
   class Dog: public Animal    
   {    
       public:  
     void bark(){  
    cout<<"The Dog is Barking.";   
     }    
   };   
int main(void) {  
    Dog d1;  
    d1.eat();  
    d1.bark();  
    return 0;  
} 

Output:

The Dog is Eating.
The Dog is Barking.