This simple example consists of an overview of the syntax of inheritance in C++

inheritance.cpp

// This source code written by Roland Ihasz 
#include <iostream>
#include <string>

using namespace std;

class Animals {     //base class
private:
    string name;
    int lifespan;
public:
    Animals() {
        name = "";
        lifespan = 0;
    }
    Animals(string animalName, int animalLifespan) {
        name = animalName;
        lifespan = animalLifespan;
    }
    ~Animals(){}     // destructor
    
    string getName(){
        return name;
    }
    void setName(string animalName){
        name = animalName;
    }
    int getLifespan(){
        return lifespan;
    }
    void setLifespan(int animalLifespan){
        lifespan = animalLifespan;
    }
};

class Mammals : public Animals {     //     derived class
private:
    string endangered;
public:
    Mammals() : endangered("") {} //     defult constructor
    Mammals(string name, int lifespan, string isEndangered) : Animals(name, lifespan) {     // constructor
        endangered = isEndangered;
    }
    ~Mammals(){}    //     destructor
    
    string getEndangered(){
        return endangered;
    }
};

int main()
{
    Animals animal1("Giant tortoise", 120);
    Animals animal2("Reindeer", 12);
    cout << "Name of mammal: " << animal1.getName() << endl
         << ">>lifespan: " << animal1.getLifespan() << endl;
    cout << "Name of mammal: " << animal2.getName() << endl
         << ">>lifespan: " << animal2.getLifespan() << endl;
    Mammals mammal1("Rhesus macaque", 25, "No, Least concern");
    Mammals mammal2("Sumatran orangutan", 50, "Yes, Critically Endangered");
    cout << "Name of mammal: " << mammal1.getName() << endl
         << ">>lifespan: " << mammal1.getLifespan() << endl
         << "Is endangered?: " << mammal1.getEndangered() << endl;
    cout << "Name of mammal: " << mammal2.getName() << endl
         << ">>lifespan: " << mammal2.getLifespan() << endl
         << "Is endangered?: " << mammal2.getEndangered() << endl;
    return 0;
}