C# console input

Question

I'm having problems with my console input. Code is:

using System;
using System.Linq;

class Training
{
    static void Main()
   {
       double[] arr = Console.ReadLine().Split(' ').Select(double.Parse).ToArray();
       int[] roundedNums = new int[arr.Length];
       for (int i = 0; i < arr.Length; i++)
       {
           roundedNums[i] = (int)Math.Round(arr[i], MidpointRounding.AwayFromZero);
       }
       for (int i = 0; i < roundedNums.Length; i++)
       {
           Console.WriteLine("{0} => {1}", arr[i], roundedNums[i]);
       }
   }
}

When i start the program i get an exception if i use . instead of , (example: if I type 3.5 i get an error, but if I type 3,5 the program works fine). I'm using Visual Studio Community 2015.

How can i solve this?

You're running in a Culture different to English. Some culutres only ',' char as a decimal separator. — CodeNotFound
– CodeNotFound, Commented Oct 9, 2016 at 9:17

Karolis Kajenas · Accepted Answer · 2016-10-09 09:42:30Z

1

You can change your code to use specific culture. For example invariant culture, which would then treat '.' as a decimal separator and ',' as group separator.

You can apply InvariantCulture as such:

double[] arr = Console.ReadLine()
               .Split(' ')
               .Select(x => double.Parse(x, CultureInfo.InvariantCulture))
               .ToArray();

Some of the cultures default a space (' ') as decimal or group separators and '.' or ',' is interpreted as invalid input.

You can look up your separators used by default with two properties:

Thread.CurrentThread.CurrentCulture.NumberFormat.NumberGroupSeparator;
Thread.CurrentThread.CurrentCulture.NumberFormat.NumberDecimalSeparator;

edited Oct 9, 2016 at 9:42

answered Oct 9, 2016 at 9:22

Karolis Kajenas

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1 Comment

Karolis Kajenas Over a year ago

@ognyan Type Region in start search > Advanced settings... and you can choose what separators to use for your default culture. You can also use properties mentioned in the answer to override your current threads culture settings. For example: Thread.CurrentThread.CurrentCulture.NumberFormat.NumberGroupSeparator = ",";

CodeNotFound · Accepted Answer · 2016-10-09 09:28:07Z

0

replace this :

double[] arr = Console.ReadLine().Split('.').Select(double.Parse).ToArray();

with your this line :

double[] arr = Console.ReadLine().Split(' ').Select(double.Parse).ToArray();

Is it working ? let me know. :)

edited Oct 9, 2016 at 9:28

CodeNotFound

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answered Oct 9, 2016 at 9:24

Khaled Md. Tuhidul Hossain

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2 Comments

CodeNotFound Over a year ago

This is really wrong :-) The split stand for to let user to enter multiple values not for spliting a single value

Khaled Md. Tuhidul Hossain Over a year ago

@CodeNotFound okey sir. then i misunderstood his Question . my apology

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