Convert String to Int in a Single Line C#-CodePudding

I have a string input like:

1 3 4 1 2

I want to Sum the number into integer. I tried the following code:

using System;
                    
public class Program
{
    public static void Main()
    {
        string input2 = "1 3 4 1 1";
        string value2 = input2.Replace(" "," ");
        int val = int.Parse(value2);
        
        Console.WriteLine(val);
    }
}

But it is not correct. Does anyone have an idea for this? Thank you.

CodePudding user response：

You can try Split the initial string (input2) into items, TryParse them into corresponding int bvalues and then Sum them with a help of Linq:

using System.Linq;

...

int val = value2 
  .Split(' ', StringSplitOptions.RemoveEmptyEntries)
  .Sum(item => int.TryParse(item, out int value) ? value : 0);

Here all invalid items (i.e. items which can't be parsed as an integer) are ignored (we turn them into 0). You may want an exception thrown in this case:

using System.Linq;

...

int val = value2 
  .Split(' ', StringSplitOptions.RemoveEmptyEntries)
  .Sum(item => int.Parse(item));

Finally, your code amended (we can use an old trick with DataTable.Compute):

using System.Data;

...

string input2 = "1 3 4 1 1";

string formula = input2.Replace(' ', ' ');

using (DataTable table = new DataTable())
{
    int val = Convert.ToInt32(table.Compute(formula, null));

    Console.WriteLine(val);
}

CodePudding user response：

You can Split input2 with a space character into an array then use system.linq.enumerable.sum()

   string input2 = "1 3 4 1 1";
   var result=  input2.Split(' ').Sum(x=> int.Parse(x));