Write C# Program to calculate the total marks, percentage and division of student based on three subjects.

 I have used Visual Studio 2012 for debugging purpose. But you can use any version of visul studio as per your availability..

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
 
public class csharpExercise
{
    static void Main(string[] args)
    {
        double rl, phy, che, ca, total;
        double per;
        string nm, div;
 
        Console.Write("\n\n");
        Console.Write("Calculate the total, percentage and division to take marks of three subjects:\n");
        Console.Write("-------------------------------------------------------------------------------");
        Console.Write("\n\n");
 
 
        Console.Write("Input the Roll Number of the student :");
        rl = Convert.ToInt32(Console.ReadLine());
 
        Console.Write("Input the Name of the Student :");
        nm = Console.ReadLine();
 
        Console.Write("Input  the marks of Physics : ");
        phy = Convert.ToInt32(Console.ReadLine());
        Console.Write("Input  the marks of  Chemistry : ");
        che = Convert.ToInt32(Console.ReadLine());
        Console.Write("Input  the marks of Computer Application : ");
        ca = Convert.ToInt32(Console.ReadLine());
 
        total = phy + che + ca;
        per = total / 3.0;
        if (per >= 60)
            div = "First";
        else
            if (per < 60 && per >= 48)
                div = "Second";
            else
                if (per < 48 && per >= 36)
                    div = "Pass";
                else
                    div = "Fail";
 
        Console.Write("\nRoll No : {0}\nName of Student : {1}\n", rl, nm);
        Console.Write("Marks in Physics : {0}\nMarks in Chemistry : {1}\nMarks in Computer Application : {2}\n", phy, che, ca);
        Console.Write("Total Marks = {0}\nPercentage = {1}\nDivision = {2}\n", total, per, div);
 
        Console.ReadLine();
    }
}

Result:

Calculate the total, percentage and division to take marks of three subjects:

-------------------------------------------------------------------------------

Input the Roll Number of the student :15

Input the Name of the Student :Rohit Mhatre

Input  the marks of Physics : 85

Input  the marks of  Chemistry : 75

Input  the marks of Computer Application : 65

Roll No : 15

Name of Student : Rohit Mhatre

Marks in Physics : 85

Marks in Chemistry : 75

Marks in Computer Application : 65

Total Marks = 225

Percentage = 75

Division = First