I'm struggling with a piece of code and getting the error:
Too many characters in character literal error
Using C# and switch statement to iterate through a string buffer and reading tokens, but getting the error in this line:
case '&&':
case '||开发者_JAVA百科':
case '==':
How can I keep the ==
and &&
as a char?
This is because, in C#, single quotes (''
) denote (or encapsulate) a single character, whereas double quotes (""
) are used for a string of characters. For example:
var myChar = '=';
var myString = "==";
Here's an example:
char myChar = '|';
string myString = "||";
Chars are delimited by single quotes, and strings by double quotes.
The good news is C# switch statements work with strings!
switch (mytoken)
{
case "==":
//Something here.
break;
default:
//Handle when no token is found.
break;
}
You cannot treat ==
or ||
as chars, since they are not chars, but a sequence of chars.
You could make your switch...case work on strings instead.
A char can hold a single character only, a character literal is a single character in single quote, i.e. '&'
- if you have more characters than one you want to use a string, for that you have to use double quotes:
case "&&":
I faced the same issue.
String.Replace('\\.','')
is not valid statement and throws the same error.
Thanks to C# we can use double quotes instead of single quotes and following works
String.Replace("\\.","")
I believe you can do this using a Unicode encoding, but I doubt this is what you really want.
The ==
is the unicode value 2A76 so I belive you can do this:
char c = '\u2A76';
I can't test this at the moment but I'd be interested to know if that works for you.
You will need to dig around for the others. Here is a unicode table if you want to look:
http://www.tamasoft.co.jp/en/general-info/unicode.html
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