C# 十进制值检查是否为零
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Decimal Value Check if Zero
提问by
I am trying to write a division method, which accepts 2 parameters.
我正在尝试编写一个除法方法，它接受 2 个参数。
public static decimal Divide(decimal divisor, decimal dividend)
{
return dividend / divisor;
}
Now, if divisor is 0, we get cannot divide by zero error, which is okay.
现在，如果除数为 0，我们得到不能被零除的错误，这没关系。
What I would like to do is check if the divisor is 0 and if it is, convert it to 1. Is there way to do this with out having a lot of if statements in my method? I think a lot of if()s makes clutter. I know mathematically this should not be done, but I have other functionality for this.
我想要做的是检查除数是否为 0，如果是，则将其转换为 1。有没有办法在我的方法中没有很多 if 语句的情况下做到这一点？我认为很多 if() 会造成混乱。我知道数学上不应该这样做，但我有其他功能。
For example:
例如：
if(divisor == 0)
{
divisor = 1;
}
return dividend / divisor;
Can it be done without the if()statement?
可以不用if()声明吗？
采纳答案by CodeLikeBeaker
You can do a conditional if statement like this. This is the same as IIF in VB.net
您可以执行这样的条件 if 语句。这与VB.net中的IIF相同
return dividend / ((divisor == 0) ? 1 : divisor);
Make sure you wrap your second half with () or you will get a divide error.
确保你用 () 包裹你的后半部分，否则你会得到一个除法错误。
回答by Brandon
This is pretty much the same as an if statement, but it is cleaner.
这与 if 语句几乎相同，但更简洁。
return dividend / divisor == 0 ? 1 : divisor;
回答by Jakub ?turc
By using the ?:operator
通过使用?:运算符
return (divisor == 0) ? dividend : dividend / divisor
回答by driis
You could create your own type and overload the / operator to get the desired behaviour, if you really want. Implement the implicit conversion operators to avoid casting or type converting.
如果您真的想要，您可以创建自己的类型并重载 / 运算符以获得所需的行为。实现隐式转换运算符以避免强制转换或类型转换。
I don't think it would be a good idea, however, since it would add some runtime overhead; with the only benefit that you get some code that (arguably) looks a little cleaner.
但是，我认为这不是一个好主意，因为它会增加一些运行时开销；唯一的好处是你得到了一些（可以说）看起来更干净的代码。
回答by seekingtheoptimal
you can just compare to decimal.Zerolike somDecimalVar == decimal.Zero
你可以比较decimal.Zero喜欢somDecimalVar == decimal.Zero
