Answer to Question #194909 in C++ for Anonymous

Question

Write C++ programs that illustrate how the following forms of inheritance are supported:

a)Single inheritance

b)Multiple inheritances

c)Multi-level inheritance

d)Hierarchical inheritance

Answer 1

a)

#include <iostream>
#include <string>
using namespace std;
class Grandfather{
    protected:
    string surname;
    public:
    Grandfather(string s):surname(s){}
};
class Father:public Grandfather{

    string name;

    public:
    Father(string a, string b): Grandfather(b), name{a}{}
    void details(){
        cout<<name<<" "<<surname;
    }
};
int main(){
    Father f("Lucas", "Graham");
    f.details();
    return 0;
}

b)

#include <iostream>
#include <string>
using namespace std;
class Father{
    protected:
    string gene = "Y";
    public:
    Father(){}
};
class Mother{
    protected:
    string gene = "X";
    public:
    Mother(){}
};
class Son:public Father, public Mother{
    public:
    string genes = Mother::gene + Father::gene;
    Son(){}
};
int main(){
    Son son;
    cout<<son.genes;
    return 0;
}

c)

#include <iostream>
#include <string>
using namespace std;
class Grandfather{
    protected:
    string surname;
    public:
    Grandfather(string s):surname(s){}
};
class Father:public Grandfather{
    string name;
    public:
    Father(string a, string b): Grandfather(b), name{a}{}
};
class Grandson: public Father{
    string name;
    public:
    Grandson(string a, string b): Father("", b), name(a){}
    void details(){
        cout<<name<<" "<<surname;
    }
};
int main(){
    Grandson s("Lucious", "Graham");
    s.details();
    return 0;
}

d)

#include <iostream>
#include <string>
using namespace std;
class Father{
    protected:
    string ygene = "Y";
    string xgene = "X";
    public:
    Father(){}
};
class Mother{
    protected:
    string gene = "X";
    public:
    Mother(){}
};
class Daughter:public Father, public Mother{
    public:
    string genes = Mother::gene + Father::xgene;
    Daughter(){}
};
class Son:public Father, public Mother{
    public:
    string genes = Mother::gene + Father::ygene;
    Son(){}
};
int main(){
    Son son;
    Daughter daughter;
    cout<<son.genes;
    cout<<endl<<daughter.genes;
    return 0;
}