using System;

​

namespace ConsoleApp1

{

    class Program

    {

        static void Main(string[] args)

        {

            String[] stdName = new String[5] { "aa","bb","cc","dd","ee"};

            int[] grades = new int[5] { 85,90,55,86,22};

            int z = 0,t =0 ,y = -1 ;

            Console.Write("enter name to find :");

            String NameToFind = Console.ReadLine();

            for ( int x = 0 ; x < grades.Length ; x++)

            {

            //    Console.WriteLine("{0} is bigger then {1} : {2}", grades[x], grades[z], grades[x]>grades[z]);

                if (grades[x] > grades[z])

                {

                    z = x;

                }

                if (grades[x] < grades[t])

                {

                    t = x;

                }

                if (NameToFind == stdName[x])

                {

                    y = x;

                }

​

​

            }

            Console.WriteLine("{0} you have the best scoor and {1} you have the worst scoor", stdName[z],stdName[t]);

            if (y>-1)

            {

                Console.WriteLine("student name : {0} his grade is {1}", NameToFind, grades[y]);

            }

            else

            {

                Console.WriteLine("student name : {0} not found", NameToFind);

            }

        }

    } 

}

​