2022 鐵人賽文 搬回點部落
開始試煉
自訂class 怎麼算加減乘除
首先 先來自訂class
void Main()
{
var gil1 = new Gil(50);
var gil2 = new Gil(25);
(gil1 + gil2).ToString().Dump("gil1 + gil2");
(gil1 - gil2).ToString().Dump("gil1 - gil2");
(gil1 * gil2).ToString().Dump("gil1 * gil2");
(gil1 / gil2).ToString().Dump("gil1 / gil2");
}
public class Gil
{
public int Amount { get; set; }
public string CurrencyName { get; } = "GD";
public Gil(int amount)
{
Amount = amount;
}
public override string ToString() => $"{Amount} {CurrencyName}";
}
IDE直接噴錯
CS0019 Operator '+' cannot be applied to operands of type 'Gil' and 'Gil'
參考
運算子多載
之前技巧1 處理相等時 只有寫 operator == 跟!=
(相等的部分請看一下技巧1)
把加減乘除也補上吧
void Main()
{
var gil1 = new Gil(50);
var gil2 = new Gil(25);
(gil1 + gil2).ToString().Dump("gil1 + gil2");
(gil1 - gil2).ToString().Dump("gil1 - gil2");
(gil1 * gil2).ToString().Dump("gil1 * gil2");
(gil1 / gil2).ToString().Dump("gil1 / gil2");
}
public class Gil
{
public int Amount { get; set; }
public string CurrencyName { get; } = "GD";
public Gil(int amount)
{
Amount = amount;
}
public override string ToString() => $"{Amount} {CurrencyName}";
public static Gil operator +(Gil a) => a;
public static Gil operator -(Gil a) => new Gil(-a.Amount);
public static Gil operator +(Gil a, Gil b)
=> new Gil(a.Amount + b.Amount);
public static Gil operator -(Gil a, Gil b)
=> a + (-b);
public static Gil operator *(Gil a, Gil b)
=> new Gil(a.Amount * b.Amount);
public static Gil operator /(Gil a, Gil b)
{
if (b.Amount == 0) throw new DivideByZeroException();
return new Gil(a.Amount / b.Amount);
}
}
結束試煉
加減乘除比較少用到 自訂物件跟數相關的也不多
如果內容有誤請多鞭策謝謝