class1.cs

C#开发教程 由浅入深 配有实例 是初学者的好帮手

using System;

namespace VirtualsInCtors
{
	class Employee
	{
		public string name;
		public Employee(string name) 
		{ 
			this.name = name; 
			Console.Write("Employee.CalculatePay:\n\t");
			CalculatePay();
		}

		public virtual void CalculatePay()
		{
			Console.WriteLine(
				"Employee.CalculatePay called for {0}", 
				name);
		}
	}

	class SalariedEmployee : Employee
	{
		public decimal salary;
		public SalariedEmployee (string name, decimal salary)
			: base(name) 
		{ 
			this.salary = salary; 
			Console.Write("SalariedEmployee.CalculatePay:\n\t");
			CalculatePay();
		}
		public override void CalculatePay()
		{
			Console.WriteLine(
				"{0}, SalariedEmployee, salary={1:C}", 
				name, salary);
		}
	}

	class ContractEmployee : Employee
	{
		public double rate;
		public ContractEmployee(string name, double rate)
			: base(name) 
		{ 
			this.rate = rate; 
			Console.Write("ContractEmployee.CalculatePay:\n\t");
			CalculatePay();
		}

		public override void CalculatePay()
		{
			Console.WriteLine(
				"{0}, ContractEmployee, rate={1:C}", 
				name, rate);
		}
	}

	class Test
	{
		protected Employee[] employees;

		[STAThread]
		static void Main(string[] args)
		{
			Employee[] employees = new Employee[2];
			employees[0] = new ContractEmployee(
				"Adam Barr", 123.45);
			employees[1] = new SalariedEmployee(
				"Max Benson", 67890m);
		}
	}
}