Design a class that holds the following personal data: name, age, and phone number. Write appropriate accessor and mutator functions. Demonstrate the class by writing a program that creates three instances of it. One instance should hold your information, and the other two should hold your friend's or family member's information.

The program in C++ is as follows:

#include <iostream>

using namespace std;

class MyClass {

 public:      

   string name;

   int age;  

   int phone;};

int main() {

   MyClass me;  

   me.name = "MrRoyal";

   me.age = 10;

   me.phone = 12345;

   MyClass frnd;  

   frnd.name = "Friend";

   frnd.age = 12;

   frnd.phone = 34567;

   MyClass family;  

   family.name = "Family";

   family.age = 15;

   family.phone = 10111;

   cout << me.name << " " << me.age<<" "<<me.phone<<endl;

   cout << frnd.name << " " << frnd.age<<" "<<frnd.phone<<endl;

   cout << family.name << " " << family.age<<" "<<family.phone<<endl;  

 return 0;}

Explanation:

This defines the class

class MyClass {

The access specifier

 public:      

The next three lines are the attributes of the class

   string name;

   int age;  

   int phone;};

The main begins here

int main() {

This creates the class instance for me (you)

   MyClass me;  

This sets the name

   me.name = "MrRoyal";

This sets the age

   me.age = 10;

This sets the phone number

   me.phone = 12345;

This creates the class instance for your friend

   MyClass frnd;  

This sets the name

   frnd.name = "Friend";

This sets the age

   frnd.age = 12;

This sets the phone number

   frnd.phone = 34567;

This creates the class instance for a family member

   MyClass family;  

This sets the name

   family.name = "Family";

This sets the age

   family.age = 15;

This sets the phone number

   family.phone = 10111;

These print the necessary outputs

   cout << me.name << " " << me.age<<" "<<me.phone<<endl;

   cout << frnd.name << " " << frnd.age<<" "<<frnd.phone<<endl;

   cout << family.name << " " << family.age<<" "<<family.phone<<endl;  

 return 0;}