[英]C# solve simplest equations
In C#, I am looking for a way to solve simple equations like this. 在C#中,我正在寻找一种解决此类简单方程的方法。
Z = A + B
I am trying to build a class that would give me the 3rd parameter if I give any of the 2 others. 我正在尝试构建一个类,如果我给出其他2个参数中的任何一个,它将给我第3个参数。
Example, given Z=A+B
示例,给定
Z=A+B
If you know A=3
and B=6
then you know Z=9
如果您知道
A=3
和B=6
那么您知道Z=9
If you know A=4
and Z=8
then you know B=4
如果您知道
A=4
和Z=8
那么您知道B=4
How would I best perform these kinds of tasks in software? 我如何最好地在软件中执行这些任务?
The other idea is to use math expressions evaluates, like ncalc. 另一个想法是使用数学表达式求值,例如ncalc。 They can interpret math expressions, for example convert
3*(8+2)
into 30
, but not solve equations like 3*(8+x)=30
--> x=2
. 他们可以解释数学表达式,例如将
3*(8+2)
转换为30
,但不能求解3*(8+x)=30
> x=2
类的方程。
Are you sure NCalc wouldn't do what you need? 您确定NCalc不会满足您的需求吗? Take a look at an example from http://ncalc.codeplex.com/ .
看一下http://ncalc.codeplex.com/中的示例。
Define parameters, even dynamic or expressions
定义参数,甚至动态或表达式
Expression e = new Expression("Round(Pow([Pi], 2) + Pow([Pi2], 2) + [X], 2)");
e.Parameters["Pi2"] = new Expression("Pi * [Pi]");
e.Parameters["X"] = 10;
e.EvaluateParameter += delegate(string name, ParameterArgs args)
{
if (name == "Pi")
args.Result = 3.14;
};
Debug.Assert(117.07 == e.Evaluate());
Please note this is untested - but it looks like you could do something like this with NCalc: 请注意,这未经测试-但看起来您可以使用NCalc执行以下操作:
var e = new Expression("[A] + [B]");
e.Parameters = /* your input */
var result = e.Evaluate();
试用C#Expression Evaluator ,看看它是否符合您的要求。
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