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

namespace pro5
{
    class Program
    {
        static void Main(string[] args)
        {
            /* addition  of three subject marks*/
            Console.WriteLine("enter student name");
            string name=Console.ReadLine();
            Console.WriteLine("enter 1 subject marks");
            int m1 = Convert.ToInt32(Console.ReadLine());
            Console.WriteLine("enter 2 subjct marks");
            int m2 = Convert.ToInt32(Console.ReadLine());
            Console.WriteLine("enter 3 subjct marks");
            int m3 = Convert.ToInt32(Console.ReadLine());
            int res = m1+m2+m3;
            Console.WriteLine(name+"  total marks is" + res);
            Console.ReadLine();
        }
    }
}


Output :


lg4