4.6: Types of Inheritance in C++

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Multiple Inheritance: Multiple Inheritance is a feature of C++ where a class can inherit from more than one classes. i.e one sub class is inherited from more than one base classes.

A derived class A that inherits from base classes B and C

Syntax:

class subclass_name : access_mode base_class1, access_mode base_class2, ....
{
  //body of subclass
};

Here, the number of base classes will be separated by a comma (‘, ‘) and access mode for every base class must be specified.


// C++ program to explain  
// multiple inheritance 
#include <iostream> 
using namespace std; 
  
// first base class 
class Vehicle 
{ 
  public: 
    Vehicle() 
    { 
      cout << "This is a Vehicle" << endl; 
    } 
}; 
  
// second base class 
class FourWheeler 
{ 
  public: 
    FourWheeler() 
    { 
      cout << "This is a 4 wheeler Vehicle" << endl; 
    } 
}; 
  
// sub class derived from two base classes 
class Car: public Vehicle, public FourWheeler 
{
    public:
    Car()
    {
      cout << "This vehicle is a 4 wheeldrive Car" << endl;
    } 
  
}; 
  
// main function 
int main() 
{    
    // creating object of sub class will 
    // invoke the constructor of base classes 
    Car obj; 
    return 0; 
}

Output:

This is a Vehicle
This is a 4 wheeler Vehicle
This vehicle is a 4 wheeldrive Car

Contributed by Harsh Agarwal
Geeks for Geeks