[C#]급여 계산

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

public class Pay
{
    public int EmployeeNumber { get; set; } // 사원 번호
    public int SalaryNumber { get; set; } // 급
    public int SalaryClass  { get; set; } // 호
    public int Allowance { get; set; } // 수당
    public int TaxAmountPayable { get; set; } // 지급액
    public int Tax { get; set; } // 세금
    public int CalculatingTable { get; set; } // 급호봉 계산표
    public double TaxRate { get; set; } // 세율
    public int MediPay { get; set; } // 조정액
    public int ResultPay { get; set; } // 차인지급액
    public Pay()
    {
        // Empty
    }
}

public class 급여처리
{
    public static void Main(string[] args)
    {
        Console.Title = "급여 처리 프로그램";
        //[1] Input
        List<Pay> lst = new List<Pay>(); // 입력데이터, 들어오는 만큼 데이터 저장
        Pay pi;
        string temp1 =""; // 사번
        string temp2 =""; // 급
        string temp3 =""; // 호
        string temp4 =""; // 수당
        string btn = "n";
        do
        {
            pi = new Pay();
            Console.Write("사원번호 : _\b");
            temp1 = Console.ReadLine();
            if (Convert.ToInt32(temp1) >= 1 && Convert.ToInt32(temp1) <= 9)
            {
                pi.EmployeeNumber = Convert.ToInt32(temp1);
            }
            else
            {
                Console.WriteLine("사원 번호는 정수 1자리로 입력하세요");
                return;
            }
            Console.Write("급 : _\b");
            temp2 = Console.ReadLine();
            if (Convert.ToInt32(temp2) == 1 || Convert.ToInt32(temp2) == 2)
            {
                pi.SalaryNumber = Convert.ToInt32(temp2);
            }
            else
            {
                Console.WriteLine("급 입력은 1급 또는 2급만 입력하세요");
            }
            Console.Write("호 : _\b");
            temp3 = Console.ReadLine();
            if (Convert.ToInt32(temp3) >= 1 && Convert.ToInt32(temp3) <= 5)
            {
                pi.SalaryClass = Convert.ToInt32(temp3);
            }
            else
            {
                Console.WriteLine("호 입력은 1~5 사이로 입력하세요");
            }
            Console.Write("수당 : _____\b\b\b\b\b");
            temp4 = Console.ReadLine();
            if (Convert.ToInt32(temp4) >= 1000 && Convert.ToInt32(temp4) <= 50000 && Convert.ToInt32(temp4) % 1000 == 0)
            {
                pi.Allowance = Convert.ToInt32(temp4);
            }
            else
            {
                Console.WriteLine("수당은 1,000 ~ 50,000 범위의 정수값 중 1,000의 배수로 입력하세요");
            }

            //[2] Process
            // 급호봉 계산표 급과 호에 해당하는 금액
            if (pi.SalaryNumber == 1)
            {
                switch (pi.SalaryClass)
                {
                    case 1: pi.CalculatingTable = 95000; break;
                    case 2: pi.CalculatingTable = 92000; break;
                    case 3: pi.CalculatingTable = 89000; break;
                    case 4: pi.CalculatingTable = 86000; break;
                    case 5: pi.CalculatingTable = 83000; break;
                    default: break;
                }
            }
            else if (pi.SalaryNumber == 2)
            {
                switch (pi.SalaryClass)
                {
                    case 1: pi.CalculatingTable = 80000; break;
                    case 2: pi.CalculatingTable = 75000; break;
                    case 3: pi.CalculatingTable = 70000; break;
                    case 4: pi.CalculatingTable = 65000; break;
                    case 5: pi.CalculatingTable = 60000; break;
                    default: break;
                }
            }

            // 지급액 계산
            pi.TaxAmountPayable = pi.CalculatingTable + pi.Allowance;

            // 지급액에 따른 세율과 조정액
            if (pi.TaxAmountPayable < 70000)
            {
                pi.TaxRate = 0.0;
                pi.MediPay = 0;
            }
            else if (pi.TaxAmountPayable >= 70000 && pi.TaxAmountPayable <=79999)
            {
                pi.TaxRate = 0.005;
                pi.MediPay = 300;
            }
            else if (pi.TaxAmountPayable >= 80000 && pi.TaxAmountPayable <= 89999)
            {
                pi.TaxRate = 0.007;
                pi.MediPay = 500;
            }
            else if (pi.TaxAmountPayable >= 90000)
            {
                pi.TaxRate = 0.012;
                pi.MediPay = 1000;
            }
            // 세금 구하기
            pi.Tax = (int)((double)pi.TaxAmountPayable * pi.TaxRate) - pi.MediPay;

            // 차인지급액 구하기
            pi.ResultPay = pi.TaxAmountPayable - pi.Tax;

            lst.Add(pi); // 컬렉션에 추가
            Console.WriteLine("입력(y), 종료(n) :");
            btn = Console.ReadLine().ToLower(); // 소문자로
        } while (btn == "y" && lst.Count <= 4);
        Console.Clear();

        //[3] Output
        IEnumerable<Pay> q = from p in lst orderby p.EmployeeNumber select p;

        Console.WriteLine("사번   급      호        수당   지급액 세금  차인지급액");
        foreach (var item in q)
        {
            Console.WriteLine("{0}\t{1}\t{2}\t{3}\t{4}\t{5}\t{6}", item.EmployeeNumber, item.SalaryNumber, item.SalaryClass,
                item.Allowance, item.TaxAmountPayable, item.Tax, item.ResultPay);
        }
    }
}