person-student-teacher, C#

person-student-teacher

//Rextester.Program.Main is the entry point for your code. Don't change it.
//Compiler version 4.0.30319.17929 for Microsoft (R) .NET Framework 4.5

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text.RegularExpressions;

namespace Rextester
{
    public class Program
    {
        public static void Main(string[] args)
        {
            //Your code goes here
            //Console.WriteLine("Hello, world!");
            Person p = new Person();
            Student s = new Student();
            Teacher t = new Teacher();
            
            p.Greet();
            
            Console.WriteLine("\nStudent goes here:");
            s.SetAge(21);
            s.Greet();
            s.ShowAge();
            s.GoToClasses();
            
            Console.WriteLine("\nTeacher goes here:");
            t.SetAge(30);
            t.Greet();
            t.Explain();
            
            
        }
    }//end of class program
    
    
    class Person
    {
        protected int age;
        
        public void Greet()
        {
            Console.WriteLine("Hello");
        }
        
        public void SetAge(int n)
        {
            age = n;
        }
        
    }//class person
    
    class Student:Person
    {
        public void GoToClasses()
        {
            Console.WriteLine("I'm going to class.");
        }
        
        public void ShowAge()
        {
            Console.WriteLine("My age is: " + age);
        }
        
    }//end of class STUDENT
    
    class Teacher:Person
    {
        private string subject;
        
        public void Explain()
        {
            Console.WriteLine("Explanation begins.");
        }
        
        
    }
    
    
}//end of everything


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