using System;
public class Program
{
public static void Main()
/* 1
Console.WriteLine("=============================================================");
Console.WriteLine("คุณอยากรู้ว่าคุณสามารถเลือกตั้งได้มั้ย?");
Console.Write("ใส่ปีเกิด(พศ.)ของคุณสิ! : ");
int by = int.Parse(Console.ReadLine());
int age = 2568 - by;
Console.Write("คุณอายุ {0}",age);
Console.WriteLine("\n");
if(age >= 20)
Console.Write("ยินดีด้วย คุณเลือกตั้งได้");
else
Console.Write("เสียใจด้วย รอให้อายุถึงก่อนนะ");
*/
/* 2
Console.Write("Input first number :");
int n1 = int.Parse(Console.ReadLine());
Console.Write("Input second number :");
int n2 = int.Parse(Console.ReadLine());
if(n1 > n2)
Console.WriteLine("Number one {0} is more than Number two {1}");
else if(n1 < n2)
Console.WriteLine("Number one {0} is less than Number two {1}");
Console.WriteLine("Number one {0} is equals Number two {1}");
/* 3
Console.WriteLine("======================================================");
Console.WriteLine("{0,20}","MENU");
Console.WriteLine("Press C or c : Find area of circle");
Console.WriteLine("Press S or s : Find area of square");
Console.Write("Shoose what do you want to find :");
char chois = char.Parse(Console.ReadLine());
if(chois == 's' || chois == 'S')
Console.Write("You choose \"square\" ");
Console.Write("Input width : ");
float width = float.Parse(Console.ReadLine());
Console.Write("Input length : ");
float length = float.Parse(Console.ReadLine());
Console.WriteLine("Area = {0:F}",width*length);
}
if(chois == 'c' || chois == 'C')
Console.Write("You choose \"circel\" ");
Console.Write("Input radien : ");
float radien = float.Parse(Console.ReadLine());
Console.WriteLine("Area = {0:F}",radien*radien*3.14);
/* 4
Console.WriteLine("------------------------------------------------------");
Console.Write("Input your total prise :");
float tp = float.Parse(Console.ReadLine());
Console.Write("Do you have coupon?(y or Y/n or N) :");
char coupon = char.Parse(Console.ReadLine());
if(coupon == 'y' || coupon == 'Y'){
Console.WriteLine("Input your discount(%) :");
byte manyd = byte.Parse(Console.ReadLine());
float tprice = (tp * manyd)/100;
Console.Write("Discount from coupon ({0}%) = {1:N} Bath",manyd,tprice);
if(coupon == 'n' || coupon == 'N'){
Console.WriteLine("Discount from coupon = {0:N} Bath",tp*0.10);
Console.WriteLine("net price = {0:N} Bath",tp-(tp*0.10));
else{
Console.WriteLine("net price = {0:N} Bath",tp);
