C#复数类

using System;

namespace ConsoleIO
{
	/// <summary>
	/// Complex复数类 两个数据成员：实部：_real 虚部:_imag
	/// 
	/// </summary>
	public class Complex
	{
		private int _imag;
		private int _real;

		//默认构造函数
        public Complex()
		{
			_imag = 0;
			_real = 0;
		}

		//带两个参数的构造函数：
		public Complex(int real, int imag)
		{
			this._real = real;
			this._imag = imag;
		}


		public Complex Add(Complex c)
		{
			c._real += _real;
			c._imag += _imag;

			return c;
		}

		public void ShowResult()
		{
			Console.WriteLine("{0}+{1}i", _real, _imag);
		}
	}
	
	class Class1
	{
		/// <summary>
		/// 应用程序的主入口点。
		/// </summary>
		[STAThread]
		static void Main(string[] args)
		{
			Complex c1 = new Complex();
			Complex c2 = new Complex(1, 1);
            
			c1.ShowResult();
			c2.ShowResult();

			Complex c3 = c1.Add(c2);
			c3.ShowResult();

			Complex c4 = new Complex(2, 2);
			c4.ShowResult();

			c1 = c4.Add(c3);//c3的值被改变
			c1.ShowResult();
            c3.ShowResult();//显示改变！
			
			Console.Read();
		}
	}
}