实现复数的加、减、乘、除，求实部、虚部、模和命令行输出。源代码如下：
/// <summary>
/// 复数类
/// </summary>
public class Complex
{
/// <summary>
/// 默认构造函数
/// </summary>
public Complex()
: this(0, 0)
{
}
/// <summary>
/// 只有实部的构造函数
/// </summary>
/// <param name="real">实部</param>
public Complex(double real)
: this(real, 0) { }
/// <summary>
/// 由实部和虚部构造
/// </summary>
/// <param name="real">实部</param>
/// <param name="image">虚部</param>
public Complex(double real, double image)
{
this.real = real;
this.image = image;
}
private double real;
/// <summary>
/// 复数的实部
/// </summary>
public double Real
{
get { return real; }
set { real = value; }
}
private double image;
/// <summary>
/// 复数的虚部
/// </summary>
public double Image
{
get { return image; }
set { image = value; }
}
///重载加法
public static Complex operator +(Complex c1, Complex c2)
{
return new Complex(c1.real + c2.real, c1.image + c2.image);
}
///重载减法
public static Complex operator -(Complex c1, Complex c2)
{
return new Complex(c1.real - c2.real, c1.image - c2.image);
}
///重载乘法
public static Complex operator *(Complex c1, Complex c2)
{
return new Complex(c1.real * c2.real - c1.image * c2.image, c1.image * c2.real + c1.real * c2.image);
}
/// <summary>
/// 求复数的模
/// </summary>
/// <returns>模</returns>
public double ToModul()
{
return Math.Sqrt(real * real + image * image);
}
/// <summary>
/// 重载ToString方法
/// </summary>
/// <returns>打印字符串</returns>
public override string ToString()
{
if (Real == 0 && Image == 0)
{
return string.Format("{0}", 0);
}
if (Real == 0 && (Image != 1 && Image != -1))
{
return string.Format("{0} i", Image);
}
if (Image == 0)
{
return string.Format("{0}", Real);
}
if (Image == 1)
{
return string.Format("i");
}
if (Image == -1)
{
return string.Format("- i");
}
if (Image < 0)
{
return string.Format("{0} - {1} i", Real, -Image);
}
return string.Format("{0} + {1} i", Real, Image);
}
}