Question

c++ program

Implement a class called Person with the following members:

1a. ????, a private variable of type ??????

1b. ???, a private variable of type ???

1c. Default constructor to set name to "" and age to 0

1d. Non-default constructor which accepts two parameters for name and age

1e. A copy constructor

1f. The post-increment operator

1g. The pre-decrement operator

1h. The insertion and extraction stream operators >>and <<

Answer 1

Source Code in C++:

#include <iostream>
using namespace std;

class Person
{
private:
int age; //class variables
string name;
public:
Person() //default constructor
{
age=0;
name="";
}
Person(int age,string name) //parametrized constructor
{
this->age=age;
this->name=name;
}
Person(const Person &p) //copy constructor
{
this->age=p.age;
this->name=p.name;
}
Person operator++() //overloading pre-increment operator
{
age++;
return *this;
}
Person operator++(int) //overloading post-increment operator
{
const Person old(*this);
++(*this);
return old;
}
Person operator--() //overloading pre-decrement operator
{
age--;
return *this;
}
//overloading stream operators
friend ostream& operator <<(ostream &out,const Person &p)
{
out << "Name: " << p.name << endl << "Age: " << p.age;
}
friend istream& operator >>(istream &in,Person &p)
{
cout << "Name: ";
in >> p.name;
cout << "Age: ";
in >> p.age;
}
};
int main()
{
//testing the class
Person p;
cin >> p;
cout << "Original: " << endl;
cout << p << endl;
cout << "Post Increment: " << endl;
cout << p++ << endl;
cout << "After Post Increment: " << endl;
cout << p << endl;
cout << "Pre Decrement: " << endl;
cout << --p << endl;
return 0;
}

Output: