3) Write a C++ program on this pointer.

 #include <iostream>

#include <cstring>

using namespace std;

class Person

{

    char name[20];

    int age;

    public:

    Person(char *s, float b)

    {

        strcpy(name,s);

        age=b;

    }

    Person &  greater(Person &y)

    {

        if(y.age>age)

        return y;

        else

        return *this;

        

    }

    void display()

    {

        cout<<"Name: "<<name<<endl;

        cout<<"Age : "<<age<<endl;

        

    }

};

int main()

{

    cout<<"Program on this pointer\n";

Person P1("Kailas",49);

Person P2("Rajesh",51);

Person P3("Sunil",40);

Person P=P1.greater(P3);

cout<<" Elder person is: \n";

P.display();

 P=P1.greater(P2);

cout<<" Elder person is: \n";

P.display();

    return 0;

}

output:

Program on this pointer

 Elder person is: 

Name: Kailas

Age : 49

 Elder person is: 

Name: Rajesh

Age : 51