question about '\0'

Posted on 2003-11-23
Medium Priority
Last Modified: 2010-05-18
When I enter a char array of numbers will I need to add the \0 char as you do with words?
Question by:buckeyes33
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Expert Comment

ID: 9806670
The \0 character only specifies the logical end of a, let's use your term, "word." We can have a character array that is 80 characters in length but the "word" would occupy up to just before this \0 character.
So char arr[80] = "Hello"; would make this happen:
arr [0][1][2][3][4][5][6][7][8]...
      'H' 'e' 'l'  'l'  'o''\0' *  *  * ...
(all *'s stand for garbage data).
If using this argument to answer the question above, then, no you don't have to include the '\0' character because it does not necessarily clarify anything.

Accepted Solution

n_fortynine earned 500 total points
ID: 9806760
Well, unless you want to manipulate the entire array as a number itself using some string-related methods. In that case, you should. :)

Author Comment

ID: 9806779
Yes i am using it as a string.  So I will want to use it.  I thought so but I was not completly sure.  Thanks.
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Expert Comment

ID: 9816526
no need of it because string itself means that array of characters with a NULL '\o'  at the end of it .
 thank u very much

Expert Comment

ID: 9818446
>>no need of it because string itself means that array of characters with a NULL '\o'  at the end of it .
that is, IF some other process did it FOR you, i.e. if you use some streams to put data in there then yes, you do not have to manually set the null character. BUT, if I want to use an array of numbers as a whole number itself I DO want to do that. An array of characters which are numbers are not necessarily a string UNTIL you make it so (or have somebody done it for you making you think it's done under every circumstances).

FYI, it's '\0' (zero) not '\o'

Expert Comment

ID: 9818454
>>are not necessarily
should read : is not necessarily

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