Untitled

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

namespace QuanLyNhanVien
{
	class NhanVien
	{
		public string hoTen { get; set; }
		public string ngaySinh { get; set; }
		public double luongCoBan { get; set; }
		public double luong { get; set; }

		public virtual void nhap()
		{
			Console.WriteLine("Nhap ho ten cua nhan vien: ");
			hoTen = Console.ReadLine();
			Console.WriteLine("Nhap ngay sinh cua nhan vien: ");
			ngaySinh = Console.ReadLine();
			Console.WriteLine("Nhap luong co ban cua nhan vien: ");
			luongCoBan = Convert.ToDouble(Console.ReadLine());
		}

		public virtual void xuat()
		{
			Console.WriteLine($"Ho ten nhan vien: {hoTen}");
			Console.WriteLine($"Ngay sinh nhan vien: {ngaySinh}");
			Console.WriteLine("Luong co ban: {0}", luongCoBan);
		}
	}

	class NVVanPhong : NhanVien
	{
		public int soNgayLamViec { get; set; }
		public double troCap { get; set; }

		public NVVanPhong()
		{
		}

		public override void nhap()
		{
			base.nhap();
			Console.WriteLine("Nhap so ngay lam viec: ");
			soNgayLamViec = Convert.ToInt32(Console.ReadLine());
			Console.WriteLine("Nhap tien tro cap: ");
			troCap = Convert.ToDouble(Console.ReadLine());
		}

		public override void xuat()
		{
			base.xuat();
			Console.WriteLine("So ngay lam viec: {0}", soNgayLamViec);
			Console.WriteLine("So tien tro cap: {0}", troCap);
			tinhLuong();
			Console.Write("So tien luong la: {0}", luong);
		}

		double tinhLuong()
		{
			luong = luongCoBan + soNgayLamViec * 100000 + troCap;
			return luong;
		}

	}

	class NVSanXuat : NhanVien
	{
		public int soSanPham { get; set; }
		public NVSanXuat()
		{
		}
		public override void nhap()
		{
			base.nhap();
			Console.WriteLine("Nhap so san pham: ");
			soSanPham = Convert.ToInt32(Console.ReadLine());
		}

		public override void xuat()
		{
			base.xuat();
			Console.Write("So san pham: ", soSanPham);
			tinhLuong();
			Console.Write("So tien luong la: {0}", luong);
		}
		double tinhLuong()
		{
			luong = luongCoBan + soSanPham * 2000;
			return luong;
		}
	}

	class NVQuanLy : NhanVien
	{
		public double heSoChucVu { get; set; }
		public double thuong { get; set; }

		public NVQuanLy()
		{

		}

		public override void nhap()
		{
			base.nhap();
			Console.WriteLine("Nhap he so chuc vu: ");
			heSoChucVu = Convert.ToDouble(Console.ReadLine());
			Console.WriteLine("Nhap thuong: ");
			thuong = Convert.ToDouble(Console.ReadLine());
		}
		public override void xuat()
		{
			base.xuat();
			Console.Write("He so chuc vu: ", heSoChucVu);
			Console.Write("So thuong: ", thuong);
			tinhLuong();
			Console.Write("So tien luong la: {0}", luong);
		}

		double tinhLuong()
		{
			luong = luongCoBan * heSoChucVu + thuong;
			return luong;
		}
	}

	class Program
	{
		static void Main(string[] args)
		{
			List<NhanVien> listNhanVien = new List<NhanVien>();
			NhapDSNhanVien(listNhanVien);
			XuatDSNhanVien(listNhanVien);

			Console.WriteLine("Tong luong: {0}", TongLuong(listNhanVien));

			Console.ReadKey();
		}

		static void NhapDSNhanVien(List<NhanVien> nhanViens)
		{
			int size;
			Console.WriteLine("Nhap so luong nhan vien: ");
			size = Convert.ToInt32(Console.ReadLine());

			for (int i = 0; i < size; i++)
			{
				NhanVien tmp;
				Console.WriteLine("Nhap phong ban nhan vien:\n1. Quan ly\n2. San xuat\n3. Van phong\n==> ");
				var loaiNv = Convert.ToInt32(Console.ReadLine());
				switch (loaiNv)
				{
					case 1:
						tmp = new NVQuanLy();
						tmp.nhap();
						tmp.xuat();
						break;
					case 2:
						tmp = new NVSanXuat();
						tmp.nhap();
						tmp.xuat();
						break;
					case 3:
						tmp = new NVVanPhong();
						tmp.nhap();
						tmp.xuat();
						break;
					default:
						i--;
						continue;
				}
				nhanViens.Add(tmp);
			}
		}

		static void XuatDSNhanVien(List<NhanVien> nhanViens)
		{
			foreach (var nv in nhanViens)
			{
				nv.xuat();
			}
		}

		static double TongLuong(List<NhanVien> nhanViens)
		{
			double sum = 0;
			foreach (var nv in nhanViens)
			{
				sum += nv.luong;
			}
			return sum;
		}
	}
}