CODEWITHSUNDEEP
c#
tintincutes
tintincutes

Reputation: 5794

argument error c#

I'm doing an example from the book: The Complete Reference C# 3.0 by Herbert Schildt. It's about writing in Console.WriteLine with arguments. Here is the example: I tried this but I was getting an error: 

Project1.exe has encountered a problem and needs to be close. We are sorry for the inconvenience. Please tell Microsoft about this problem. Send Error Report or Don't Send. And if I click, I get another error in the command prompt. "Unhandled Exception: System.Format.Exception input string was not in a correct format. 
at System.Text.StringBuilder.AppendFormatError()
at System.Text.StringBuilder.AppendFormat(IFormatProvider provider,String Format, Object[]args)
at  System.IO.TextWriter.WriteLine(String format, Object arg0)
at  System.IO.TextWriter.SyncTextWriter.WriteLine(String format, Object arg0)
At Example2.Main() in D:\myPath

I'm not sure if the book has some error or is it my code? I would appreciate your help. Thanks

One of the easiest ways to specify a format is to describe a template that WriteLine( ) will use. To do this, show an example of the format that you want, using #s to mark the digit positions. You can also specify the decimal point and commas. For example, here is a better way to display 10 divided by 3:
Console.WriteLine("Here is 10/3: {0:#.##}", 10.0/3.0);
The output from this statement is shown here: Here is 10/3: 3.33

Btw this is my code looks like: 

   static void Main()
    { 
   Console.WriteLine("Here is 10/3: {0:#.##)", 10);
    }

Upvotes: 1

Views: 347

Answers (9)

Andriy Drozdyuk
Andriy Drozdyuk

Reputation: 61121

Let me also post an identical answer to everybody else for no reason whatsoever!

Replace the ##) with ##} in your code.

Upvotes: 0

patjbs
patjbs

Reputation: 4772

Corrected code below:

static void Main()    
{    
Console.WriteLine("Here is 10/3: {0:#.##}", 10.0/3);    
}

Upvotes: 1

Fredrik Leijon
Fredrik Leijon

Reputation: 2802

in the end of your string you have a ) instead of a }

Upvotes: 1

Beatles1692
Beatles1692

Reputation: 5330

It should be :

Console.WriteLine("Here is 10/3: {0:#.##}", 10);

When you are using a format you should put it in { and }

Upvotes: 1

Adam Markowitz
Adam Markowitz

Reputation: 13127

Your code is wrong. You used a parenthesis instead of a curly brace in your string literal. Try this:

static void Main()
    { 
       Console.WriteLine("Here is 10/3: {0:#.##}", 10);
    }

Upvotes: 3

Brian Rasmussen
Brian Rasmussen

Reputation: 116481

Your format string is wrong. You have a { paired with a )

Upvotes: 2

Noldorin
Noldorin

Reputation: 147461

Change ) to } - just a typo, it seems.

Upvotes: 2

Lasse V. Karlsen
Lasse V. Karlsen

Reputation: 391664

You are using the wrong ending brace for the format parameter.

Note the end parenthesis ) after #.##, it should be a } instead (curly braces).

Also note that you have left out the division, and if you simply change your code to this (corrected the brace as well):

static void Main()
{ 
    Console.WriteLine("Here is 10/3: {0:#.##}", 10/3);
}

Then you're going to have another question as well, since the result of that will be:

Here is 10/3: 3.00

The reason for this is that 10/3 is integer division, see how many times 3 goes up completely in 10, which is 3 times.

If you want floating point division, divide 10 by 3 to get 3 and 1/3rd, then you need to make sure at least one of the numbers are floating point, hence 10.0/3 will do.

Upvotes: 9

leppie
leppie

Reputation: 117330

That's because your code is incorrect.

In more than 1 place!

(the brace and the missing '/3.0' part)

Upvotes: -1

Related Questions