//重载运算符：-
public static ComplexNumber6335 operator -(ComplexNumber6335 c1, ComplexNumber6335 c2)
{
ComplexNumber6335 c3 = new ComplexNumber6335 {
A = c1.A - c2.A,
B = c1.B - c2.B
};
return(c3);
}
//重写Equal()
public override bool Equals(object obj)
{
if (obj == null)
{
return(false);
}
if (obj is ComplexNumber6335)
{
ComplexNumber6335 complexNumber = (ComplexNumber6335)obj;
return(complexNumber.A == A && complexNumber.B == B);
}
return(false);
}
/// <summary>
/// 解析思路
/// 1、先解析到复数虚部，如果没有虚部则匹配失败
/// 2、将源字符串中的虚部剔除
/// 3、根据实际匹配情况进行赋值
/// </summary>
/// <param name="input">value</param>
/// <returns>ComplexNumber6335</returns>
public static ComplexNumber6335 Parse(string input)
{
input = input.Replace(" ", string.Empty);
ComplexNumber6335 complex = new ComplexNumber6335();
/* 正则匹配规则
* (?<=(\-|\+?)\d*\.?\d*) 零宽度正回顾后发断言：确保匹配目标前方是实部，但不匹配实部
* (\-|\+?)\d*\.?\d*i 匹配虚部字符串
* (?!(\-|\+)\d) 零宽度负预测先行断言：确保匹配目标后方没有其他数字
*/
Regex rex_real = new Regex(@"(?<=(\-|\+?)\d*\.?\d*)(\-|\+?)\d*\.?\d*i(?!(\-|\+)\d)");
try {
Match m1 = rex_real.Match(input);
input = m1.Success ? input.Replace(m1.Value, string.Empty) : input;
if (m1.Value.Contains("i"))
{
if (input != string.Empty)
{
complex.A = Convert.ToDouble(input);
}
else
{
complex.A = 0.0;
}
}
else
{
throw new FormatException();
}
/* 判断
* 1、如果匹配到了虚部
* 2、虚部不为0
* 否则
* 抛异常
*/
if (m1.Success && !Regex.IsMatch(m1.Value, @"(?<=(\-|\+?))[0]+\.[0]+|[0]+|\.[0](?=i)"))
{
if (Regex.IsMatch(m1.Value, @"\-i"))
{
complex.B = -1.0;
}
else if (Regex.IsMatch(m1.Value, @"^\+?i"))
{
complex.B = 1.0;
}
else
{
complex.B = Convert.ToDouble(m1.Value.Replace("i", ""));
}
}
else
{
throw new FormatException();
}
} catch (FormatException) {
throw new FormatException();
}
return(complex);
}