using System;

​

public class Program

{

    static void TinhPTBac1()

    {

        float a, b;

        Console.Write("Hay nhap vao so a, b: ");

        a = float.Parse(Console.ReadLine());

        b = float.Parse(Console.ReadLine());

        if (a == 0 && b == 0)

            Console.Write("Phuong trinh co vo so nghiem.");

        else if (a == 0 && b != 0)

            Console.Write("Phuong trinh vo nghiem.");

        else

            Console.Write("Phuong trinh co 1 nghiem duy nhat la x= {0}", (-b) / a);

    }

    static void VD1()

    {

        char thanhtich;

        int tienthuong;

        Console.Write("Hay nhap vao thanh tich: ");

        thanhtich = Convert.ToChar(Console.ReadLine());

        switch(thanhtich)

        {

            case 'v':

                tienthuong=5500;

                break;

            case 'b':

                tienthuong=3500;

                break;

            case 'd':

                tienthuong=2500;

                break;

            case 'k':

                tienthuong=1000;

                break;

            default:

                tienthuong=0;

                break;

        }

        Console.WriteLine("{0}", tienthuong);

    }

    static void VD2()

    {

        char chucai;

        Console.Write("Hay nhap vao chu cai: ");

        chucai = Convert.ToChar(Console.ReadLine());

        switch(chucai)

        {

            case 'a':

            case 'A':

            case 'e':

            case 'E':

            case 'i':

            case 'I':

            case 'o':

            case 'O':

            case 'u':

            case 'U':

                Console.Write("{0} la chu cai nguyen am.", chucai);

                break;

            default:

                Console.Write("{0} la chu cai phu am.", chucai);

                break;

        }

    }

    static void VD3()

    {

        int n;

        do

            {

                Console.Write("Nhap n: ");

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

            }

        while (n < 3 || n > 20);

        float[] array = new float[n];

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

        {

                Console.Write("A[{0}]: ",i);

                array[i] = float.Parse(Console.ReadLine());

        }

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

        {

            for (int j = i + 1; j < n; j++)

            {

                if (array[i] > array[j])

                {

                    float temp = array[i];

                    array[i] = array[j];

                    array[j] = temp;

                }

             }

        }

        Console.Write("Array = ");

        foreach (float item in array)

            {

                Console.Write(item + "\t");

            }

    }

    public static void Main(string[] args)

    {

        //TinhPTBac1();

        //VD1();

        //VD2();

        VD3();

    }

}