Single Inheritance in C++ (with Example)

In C++ Single inheritance, one base class is derived from one sub class. Hence the two related classes (Base & Sub class) exhibit one to one relation.

Block Diagram of Single Inheritance in C++

Syntax of Single Inheritance in C++

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class Base{
    //Class Members
};
 
class Derive : public Base {
    //Class Members
};

Example for Single Inheritance in C++

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#include <iostream>
 
using namespace std;
 
class Account{
public:
    double balance;
    Account(){
        balance = 0.0;
    }
 
    void deposit(double amt){
        balance += amt;
        cout << amt <<" Deposited" << endl;
    }
    //Pure Virtual Function
    void withdraw(double amt){
        balance -= amt;
        cout << amt<<" Withdrawn \n";
    }
};
 
class SavingsAccount :public Account{
public:
    double interestRate;
 
    SavingsAccount(){
        balance = 0.0;
        interestRate = 5.1;
    }
 
};
 
int main()
{
   SavingsAccount sa;
   sa.deposit(1000);
   sa.withdraw(400);
 
   cout << "Savings Account Balance: "<< sa.balance << endl;
}

Output

Output of Single Inheritance Program

Single Inheritance is the simplest form of C++ Inheritance. The most important point to note is that only those members of the base class can be accessed in the derived class which is declared/specified as public. Private data members or members method cannot be accessed in the derived class (sub class).

This Post Has One Comment

  1. Lynette

    5 Apr 2019 Reply

    Greeting of the day!

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