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Hej there,
Iam just new in C# and for train I want to create a Console-Calculator. I just got a simple one that can 1+1 and 1-1 and so on but now i want a bigger one that observes the hmm is it called Dot to Dash rule in English? I don´t know sorry but an example ->

My simple Calculator is working like this ->

2+2*2 = 8

but i want him to work like ->

2+2*2 = 6

Hope you guys know what i mean ;)

So i thought it would be the best way to split up the calculation in numbers and sings.

This works allready but i don´t know what I should do right now to get the result of a calculation :X

Hope you guys can help me. Heres my Code that i wrote allready:

```{
public static void Main()
{
int count = 0;

string[] splitnumbers = calculation.Split(new Char[] { '+', '-', '*', '/' });
string[] splitsigns = calculation.Split(new Char[] { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9' });
foreach (string s in splitnumbers)
{
count++;
if (s.Trim() != "")
Console.WriteLine(s);
Console.WriteLine(splitsigns[count]);

Console.WriteLine("For exit press Enter");
}
}
}```

Okay now i just want to go another way...

```for (int i = 0; i < splitnumbers.Length - 1; i++)
{
int firstNumber = int.Parse(splitnumbers[i].ToString());
int secondNumber = int.Parse(splitnumbers[i + 1].ToString());
string operatorString = splitsigns[i + 1].ToString();

}
```

But what now? Thought i have to get the result of this or smth. and denn calculate the next step in for example 5+6*7!?
Posted
Updated 22-Jan-20 1:33am
v2

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## Solution 1

You want to google for calculators: you need to implement an operator stack of some kind so you can use operator precedence.

Basically, you can't process operators Right-To-Left any more: you must recognise that "*" has a higher precedence than "+" and evaluate it first. Go, Google: there is a lot out there! :laugh:
fjdiewornncalwe 23-Feb-11 9:57am

Go - Go - Googlicious - Go
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## Solution 4

Hi,

what you want is a mathematical expression parser. Go and google for "mathematical expression parser c#" and you will find lots of information. Here are some links I found to be informative:
An extensible math expression parser with plug-ins[^]
http://muparser.sourceforge.net/[^]
Espen Harlinn 25-Feb-11 6:58am

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## Solution 7

Well you need to go back to theory, Read Postfix notation as this is the preciese way of doing what you want to do. Read This STACK and POSTFIX Notation[^]

Once you grab the idea than a simple google search will give you tons of examples implemented in almost all languages, the choice is yours.