[newby] What's the syntax for a "char" constant? How about an hex integer?

[Cosmin Prund]

This is supposed to be very easy, only I did not find this in MSDN so I'll
ask here:

How do I enter a char constant using the char's ASCII number? Specifically I
want to be able to compare a char to one of CR, LF, TAB (i.e: char number
13, 10, 9).

I suppose there's a problem because c#'s char's are unicode and I'm talking
ascii codes, but there must be a way to do it!

If I wore programming Delphi I would simply say
<code>
const c = #13;
</code>
for a const representing CR.

And while I'm at it, how do I enter a constant integer using HEX notation or
BINARY? Again, if I wore programming Delphi I would do something like this:
<code>
const i = $1234;
</code>

 

[Jon Skeet [C# MVP]]

This is supposed to be very easy, only I did not find this in MSDN so I'll
ask here:

How do I enter a char constant using the char's ASCII number? Specifically I
want to be able to compare a char to one of CR, LF, TAB (i.e: char number
13, 10, 9).

The best way of doing those three is '\r', '\n' and '\t'. However, you
*can* use:
'\u000d' '\u000a' and '\u0009'

Alternatively, just:

const char CR = (char)13;

I suppose there's a problem because c#'s char's are unicode and I'm talking
ascii codes, but there must be a way to do it!

Fortunately all ASCII characters have the same value in Unicode.

And while I'm at it, how do I enter a constant integer using HEX notation or
BINARY? Again, if I wore programming Delphi I would do something like this:
<code>
const i = $1234;
</code>

const int i = 0x1234;

Jon

 

[Cosmin Prund]

Thanks a lot!

The best way of doing those three is '\r', '\n' and '\t'. However, you
*can* use:
'\u000d' '\u000a' and '\u0009'

Alternatively, just:

const char CR = (char)13;


Fortunately all ASCII characters have the same value in Unicode.


const int i = 0x1234;

Jon