Re: Implicit String-Literal Concatenation

On 2024-03-07, Lawrence D'Oliveiro <ldo@nz.invalid> wrote:

On Mon, 04 Mar 2024 20:55:28 -0800, Keith Thompson wrote:
>

Lawrence D'Oliveiro <ldo@nz.invalid> writes:
>

On Thu, 29 Feb 2024 14:14:52 -0800, Keith Thompson wrote:
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"A *string* is a contiguous sequence of characters terminated by and
including the first null character."

>
So how come strlen(3) does not include the null?

 Because the *length of a string* is by definition "the number of bytes
preceding the null character".

>
So the “string” itself includes the null character, but its “length” does not?

That's correct. However, its size includes it.
 sizeof "abc" == 4
 strlen("abc") == 3
The abstract string does not include the null character;
we understand "abc" to be a three character string.
The C representation of the string includes the null character;
the size is a representational concept so it counts it.
It is common for C programs to break encapsulation and openly deal with
that terminating null.
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