Answer to Question #329539 in C# for Babar302

Question

We want to calculate the total marks of each student of a class in Physics, Chemistry and Mathematics and the average marks of the class. The number of students in the class are entered by the user. Create a class named Marks with data members for roll number, name and marks. Create three other classes inheriting the Marks class, namely Physics, Chemistry and Mathematics, which are used to define marks in individual subject of each student. Roll number of each student will be generated automatically.

Answer 1

using System;
using System.Collections.Generic;


internal class Program
{
    class Student
    {
        public Physics Physics { get; set; }
        public Chemistry Chemistry { get; set; }
        public Mathematics Mathematics { get; set; }
        public Student(Physics physics, Chemistry chemistry, Mathematics mathematics)
        {
            Physics = physics;
            Mathematics = mathematics;
            Chemistry = chemistry;
        }
    }


    class Marks
    {
        public int RollNumber { get; set; }
        public string Name { get; set; }
        public int marks { get; set; }


        public Marks (int rollNumber, string name, int marks)
        {
            RollNumber = rollNumber;
            Name = name;
            this.marks = marks;
        }
    }
    class Physics : Marks
    {
        public Physics(int rollNumber, string name, int marks) : base(rollNumber, name, marks)
        {
        }
    }
    class Chemistry : Marks
    {
        public Chemistry(int rollNumber, string name, int marks) : base(rollNumber, name, marks)
        {
        }
    }
    class Mathematics : Marks
    {
        public Mathematics(int rollNumber, string name, int marks) : base(rollNumber, name, marks)
        {
        }
    }
    static void Main()
    {
        Console.Write("Enter the number of students:");
        int N = int.Parse(Console.ReadLine());
        List<Student> students = new List<Student>();


        for (int i = 0; i < N; i++)
        {
            Console.Write("Enter student name:");
            string name = Console.ReadLine();
            Console.Write("Enter marks for physics:");
            int physicsMarks = int.Parse(Console.ReadLine());
            Console.Write("Enter marks for chemistry:");
            int chemistryMarks = int.Parse(Console.ReadLine());
            Console.Write("Enter marks for mathematics:");
            int mathematicsMarks = int.Parse(Console.ReadLine());


            students.Add(new Student(new Physics(i, name, physicsMarks), new Chemistry(i, name, chemistryMarks), new Mathematics(i, name, mathematicsMarks)));
        }


        for (int i = 0; i < students.Count; i++)
        {
            Console.Write($"{students[i].Chemistry.Name} total marks is:{students[i].Chemistry.marks + students[i].Physics.marks + students[i].Mathematics.marks}");
        }


        int average = 0;
        for (int i = 0; i < students.Count; i++)
        {
            average += (students[i].Chemistry.marks + students[i].Physics.marks + students[i].Mathematics.marks)/3;
    }
        Console.Write($"Average marks of the class:{average/students.Count}");


        Console.ReadKey();
    }


}