using System;

    class Date

    {

        private int Day;

        private int Month;

        private int Year;

​

        //פעולות בונות

        public Date(int Day, int Month, int Year)

        {

            this.Day = Day;

            this.Month = Month;

            this.Year = Year;

​

        }

​

        public Date(Date d)

        {

            this.Year = d.Year;

            this.Day = d.Day;

            this.Month = d.Month;

        }

​

        //פעולות Get (מחזירות)

        public int GetDay()

        {

            return Day;

        }

​

        public int GetMonth()

        {

            return Month;

        }

​

        public int GetYear()

        {

            return Year;

        }

​

        //פעולות SET (מעדכנות)

        public void SetDay(int Day)

        {

            this.Day = Day;

        }

​

        public void SetMonth(int Month)

        {

            this.Month = Month;

        }

​

        public void SetYear(int Year)

        {

            this.Year = Year;

        }

​

        //הפעולה COMPERTO

        public int ComperTo(Date other)

        {

            if (this.Year == other.Year)

            {

                if (this.Month == other.Month)

                {

                    return (this.Day - other.Day);

                }

                else

                {

                    return (this.Month - other.Month);

                }

            }

            else

            {

                return (this.Year - other.Year);

​

            }

        }

        // הפעולה TOSTRING

        public override string ToString()

        {

            return (Day + "/" + Month + "/" + Year);

        }

​

​

    }

class Talmid

    {

        private string name;

        private Date birth;

        private int[] grades;

​

        //פעולה בונה

        public Talmid(string name, Date birth)

        {

            this.name = name;

            this.birth = new Date(birth);//הפעלת הפעולה הבונה מעתיקה של המחלקה Date

            this.grades = new int[5];

        }

        //פעולה בונה מעתיקה

        public Talmid(Talmid t)

        {

            this.name = t.name;

            this.birth = new Date(t.birth);

            this.grades = new int[5];

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

                grades[i] = t.grades[i];

        }

        //פעולות מאחזרות

        public string GetName()

        {

            return name;

        }

        public Date GetBirth()

        {

            // return this.birth;

            //יצרנו עצם חדש מסוג תאריך על ידי הפעלת הפעולה הבונה מעתיקה

            Date temp = new Date(this.birth);

            return temp;

        }

        public int[] GetGrades()

        {

            // return this.grades;

            int[] copy = new int[this.grades.Length];

            for (int i = 0; i < copy.Length; i++)

                copy[i] = this.grades[i];

            return copy;

        }

        //פעולות קובעות

        public void SetName(string name)

        {

            this.name = name;

        }

​

        public void SetBirth(Date d)

        {

            // this.birth = d;

            //נכנס לתכונות של הפרמטר ונעתיק את התכונות ולא כתובת

            this.birth.SetDay(d.GetDay());

            this.birth.SetMonth(d.GetMonth());

            this.birth.SetYear(d.GetYear());

        }

        public void SetGrades(int[] grades)

        {

            //this.grades = grades;

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

                this.grades[i] = grades[i];

        }

        public double Avg()

        {

            int sum = 0;

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

                sum += this.grades[i];

            return (double)sum / this.grades.Length;

        }

​

        public override string ToString()

        {

            string st = ( "name: " + this.name + " ,birth: " + this.birth.ToString() + "grades: ");

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

                st += this.grades[i] + " ";

            return st;

        }

​

    }

​

  class kita

    {

        private char level;

        private int number;

        private int nstudent;

        private Talmid[] talmidim;

​

        public kita(char level, int number, int nstudent, Talmid[] talmidim)

        {

            this.level = level;

            this.number = number;

            this.nstudent = nstudent;

            this.talmidim = new Talmid[20];

            for (int i = 0; i < nstudent; i++)

            {

               this.talmidim[i] = new Talmid(talmidim[i]);

            }

​

        }

        public kita(char level, int number)

        {

            this.level = level;

            this.number = number;

            Console.WriteLine("כמה תלמידים ? ");

            nstudent = int.Parse(Console.ReadLine());

            this.talmidim = new Talmid[20];

            for (int i = 0; i < nstudent; i++)

            {

                Console.WriteLine("שם התלמיד");

                string name = Console.ReadLine();

            //חסרה קליטת יום חודש ושנה

                Date birth = new Date(17,10,2013);

                this.talmidim[i] = new Talmid(name,birth);

            }

​

        }

        public kita()

        {

            Console.WriteLine("ENTER LEVEL");

            level=char.Parse(Console.ReadLine());

            Console.WriteLine("ENTER number");

            number = int.Parse(Console.ReadLine());

            Console.WriteLine("ENTER number student");

            nstudent = int.Parse(Console.ReadLine());

            this.talmidim = new Talmid[20];

            for (int i = 0; i < nstudent; i++)

            {

                Console.WriteLine("הקלד את נתוני התלמיד");

                this.talmidim[i] = talmidim[i];

            }

        }

        public kita(kita k)

        {

            this.level = k.level;

            this.number = k.number;

            this.nstudent = k.nstudent;

            this.talmidim = new Talmid[20];

            for (int i = 0; i < nstudent; i++)

            {

                this.talmidim[i] = new Talmid(k.talmidim[i]);

            }

        }

        public char Getlevel()

        {

            return this.level;

        }

        public int Getnumber()

        {

            return this.number;

        }

        public int Getnsudent()

        {

            return this.nstudent;

        }

​

        public Talmid[] Gettalmidim()

        {

            Talmid[] copy = new Talmid[20];

            for (int i = 0; i < nstudent; i++)

            {

                copy[i] = (talmidim[i]);

            }

            return copy;

        }

        public void Setlevel(char level)

        {

            this.level = level;

        }

        public void Setnumber(int number)

        {

            this.number = number;

        }

        public void Setnsudent(int nstudent)

        {

            this.nstudent = nstudent;

        }

        public void SetTalmidim(Talmid[] talmidim)

        {

            for (int i = 0; i < nstudent; i++)

            {

                this.talmidim[i] =(talmidim[i]);

            }

​

        }

        public Talmid BestStudent()

        {

            double max = talmidim[0].Avg();

            int maxI = 0;

            for (int i = 0; i < nstudent; i++)

            {

                if(this.talmidim[i].Avg()>max)

                {

                    max = talmidim[i].Avg();

                    maxI = i;

                }

            }

            return talmidim[maxI];

        }

        public bool IsStudentInClass(Talmid st)

        {

            for (int i = 0; i < nstudent; i++)

            {

                if(talmidim[i].GetName()==st.GetName())

                {

                    return true;

                }

            }

            return false;

        }

​

        public bool AddStudent(Talmid stu)

        {

            if (this.nsudent ==20)

            {

                return false;

            }

            else

            {

                this.talmidim[nstudent] = stu;

                this.nstudent ++;

            }

            return true;

        }

​

        public bool Peula(int g)

        {

            for(int i=0; i< this.nstudent; i++)

            {

                for(int j=0; j<this.talmidim[i].GetGrades().Length; j++)

                {

                    if(this.talmidim[i].GetGrades()[j]==g)

                        return true;

                }           

            }

            return false;   

        }

        public override string ToString()

        {

            string s = "level" + this.level + "number" + this.number + "nstudent" + nstudent + "talmidim";

            for (int i = 0; i <nstudent ; i++)

            {

                s += this.talmidim[i].ToString() + "  ";

            }

            return s;

        }

​

    }

​

​

public class Program

{

    public static void Main()

    {

          //1

            kita k1 = new kita();

            kita k2 = new kita('9',2);

            //2

            Console.WriteLine(k1.ToString());

            Console.WriteLine(k2.ToString());

            //3

            Console.WriteLine("ישנם " + k1.Getnsudent() + " תלמידים בכיתה  k1 ");

            Console.WriteLine("ישנם" +k2.Getnsudent() + " תלמידים בכיתה k2");

            //4- **

            for (int i = 0; i < 2; i++)

            {

                Console.WriteLine("שם התלמיד");

                string nameadd= new Talmid(nameadd);

                k1. AddStudent(nameadd);

            }

            Console.WriteLine(k1.ToString());

            Console.WriteLine(k2.ToString());

​

​

            //סעיף 5:

            Console.WriteLine("התלמיד המצטיין הוא :"+""+ k1.BestStudent().ToString());

            Console.WriteLine("התלמיד המצטיין הוא:"+""+ k2.BestStudent().ToString());

            //סעיף 6:

            Console.WriteLine("enter your name");

            Talmid st = new Talmid(Console.ReadLine());

            if (k1.IsStudentInClass(st) == true)

            {

                Console.WriteLine("student in class");

            }

            else

            {

                Console.WriteLine("student is not in class");

            }

​

            //7

            int count = 0;

            for (int i = 0; i < k1.Getnsudent(); i++)

            {

                if ( k1.Gettalmidim()[i].GetName().IndexOf("לוי ") > 0 )

                {

                    count++;

                }

            }

            Console.WriteLine("ישנם" + count + " תלמידים עם השם לוי ");

             int count1 = 0;

            for (int i = 0; i <k1.Getnsudent(); i++)

            {

                if (k1.Gettalmidim[i].GetName().Indexof("כהן")>0)

                {

                    count1++;

                }

            }

            Console.WriteLine("ישנם " + count + " תלמידים עם השם כהן");

            //סעיף 8:

           int count3 = 0;

            for (int i = 0; i < k1.Getnsudent(); i++)

            {

​

                if (k1.Gettalmidim()[i].Avg(k1.Gettalmidim()[i].GetGrades()) < 55)

​

                {

                count3++;

                }

​

            }

            Console.WriteLine("יש" + count3 + "תלמידים עם ממוצע נכשל בכיתה");

           int count4 = 0;

            for (int i = 0; i < k2.Getnsudent(); i++)

            {

​

                if (k2.Gettalmidim()[i].Avg(k2.Gettalmidim()[i].GetGrades()) < 55)

​

                {

                Count4++;

                }

            }

            Console.WriteLine("יש" + count4 + "תלמידים עם ממוצע נכשל בכיתה");

​

​

            //סעיף 9:

            if (k1.BestStudent().Avg(k1.BestStudent().GetGrades()) > k2.BestStudent().Avg(k2.BestStudent().GetGrades()))

            {

​

                Console.WriteLine(k1.BestStudent().ToString());

            }

            else

            {

                Console.WriteLine(k2.BestStudent().ToString());

            }

​

            //סעיף 10:

             int count5 = 0;

            for (int i = 0; i < k1.Getnsudent(); i++)

            {

                if (k1.Gettalmidim()[i].Avg(k1.Gettalmidim()[i].GetGrades()) > 85)

                {

                    Count5++;

                }

            }

            for (int i = 0; i < k2.Getnsudent(); i++)

            {

                if (k2.Gettalmidim()[i].Avg(k2.Gettalmidim()[i].GetGrades()) > 85)

                {

                    Count5++;

                }

            }

            Console.WriteLine("יש " + count + " תלמידים עם ממוצע מעל 85");

​

            Console.ReadKey();

        }

​

​

    }

}