«

hi ,
please explain me , char pointer , char Array, char ,string...
i have some many confussion about this...
please clarify to me..
i need some example about this program
by
chellappa.ns

chellappa wrote:

> please explain me , char pointer , char Array, char ,string...

A decent book on C will explain all this, and be faster than
drip-feeding via Usenet. But:

A `char pointer` is a pointer that points to characters.
A `char array` is an array whose elements are characters.
A `char` is a value which is/represents a character.
A `string` is a sequence of characters terminated by a
null (== 0) character.

[A `sequence of characters` is a contiguous slice out of an
array or mallocated store.]

--
Chris "electric hedgehog" Dollin
It's called *extreme* programming, not *stupid* programming.

please give some examples

"chellappa" <> wrote in message
news: oups.com...
> please give some examples

Please preserve context when posting. Thank you.

Please get a textbook. You won't get far without
one.


"Chris Dollin" <> wrote in message
news:dagmtd$lrl$...
> chellappa wrote:
>
>> please explain me , char pointer , char Array, char ,string...
>
> A decent book on C will explain all this, and be faster than
> drip-feeding via Usenet. But:
>
> A `char pointer` is a pointer that points to characters.
> A `char array` is an array whose elements are characters.
> A `char` is a value which is/represents a character.
> A `string` is a sequence of characters terminated by a
> null (== 0) character.
>
> [A `sequence of characters` is a contiguous slice out of an
> array or mallocated store.]

"chellappa" <> wrote in message
news: oups.com...
> please give some examples

char *p; /* 'char pointer' (a.k.a. 'Pointer to char'). */
/ * can represent address of a type 'char' object */

char a[10]; /* 'char array' (a.k.a. 'array of char'). */
/* can store ten type 'char' objects at */
/* contiguous memory locations */

char c; /* a type 'char' object. Can represent any one */
/* of the values of the execution character set */

char s[10] = "Hello" ; /* 'char array' (a.k.a. 'array of char'). */
/* The first six elements of the array */
/* (s[0] through s[5] inclusive) comprise */
/* a 'string' */


-Mike

"Mike Wahler" <> skrev i en meddelelse
news:YCRye.13635$ hlink.net...
>
> "chellappa" <> wrote in message
> news: oups.com...
>> please give some examples
>
> Please preserve context when posting. Thank you.
>
> Please get a textbook. You won't get far without
> one.
>
>
> "Chris Dollin" <> wrote in message
> news:dagmtd$lrl$...
>> chellappa wrote:
>>
>>> please explain me , char pointer , char Array, char ,string...
>>
>> A decent book on C will explain all this, and be faster than
>> drip-feeding via Usenet. But:
>>
>> A `char pointer` is a pointer that points to characters.
>> A `char array` is an array whose elements are characters.
>> A `char` is a value which is/represents a character.
>> A `string` is a sequence of characters terminated by a
>> null (== 0) character.
>>
>> [A `sequence of characters` is a contiguous slice out of an
>> array or mallocated store.]
>
> "chellappa" <> wrote in message
> news: oups.com...
>> please give some examples
>
> char *p; /* 'char pointer' (a.k.a. 'Pointer to char'). */
> / * can represent address of a type 'char' object */
>
> char a[10]; /* 'char array' (a.k.a. 'array of char'). */
> /* can store ten type 'char' objects at */
> /* contiguous memory locations */
>
> char c; /* a type 'char' object. Can represent any one */
> /* of the values of the execution character set */
>
> char s[10] = "Hello" ; /* 'char array' (a.k.a. 'array of char'). */
> /* The first six elements of the array */
> /* (s[0] through s[5] inclusive) comprise */
wrong !! the: char s[10] = "Hello" assign 7 elements, don´t forget the zero
termination of the string at position
s[7]
> /* a 'string' */
>
>
> -Mike
>
>

Frank Mikkelsen wrote:
> "Mike Wahler" <> skrev i en meddelelse
> news:YCRye.13635$ hlink.net...

>>char s[10] = "Hello" ; /* 'char array' (a.k.a. 'array of char'). */
>> /* The first six elements of the array */
>> /* (s[0] through s[5] inclusive) comprise */
>
> wrong !! the: char s[10] = "Hello" assign 7 elements, don´t forget the zero
> termination of the string at position
> s[7]

Please explain why 5, the strlen("Hello"), + 1 for the terminating '\0'
gives 7.

When you assert that 5+1=7 and label 5+1=6 as "wrong !!", you have an
obligation to expound on your new theory of arithmetic.

Frank Mikkelsen wrote:
>> char s[10] = "Hello" ; /* 'char array' (a.k.a. 'array of char'). */
>> /* The first six elements of the array */
>> /* (s[0] through s[5] inclusive) comprise */
> wrong !! the: char s[10] = "Hello" assign 7 elements

The prior poster is correct:
s[0] = 'H'
s[1] = 'e'
s[2] = 'l'
s[3] = 'l'
s[4] = 'o'
s[5] = '\0'

That is 6 characters.

> don´t forget the zero termination of the string at position s[7]

If you were correct, and "Hello" took seven elements, then s[0]...s[5]
would contain the printable characters and s[6] (the 7th element of the
array), would contain the zero-termination character.

"Frank Mikkelsen" <> wrote in message
news:42cc272e$0$21463$ ...
>
> "Mike Wahler" <> skrev i en meddelelse
> news:YCRye.13635$ hlink.net...
>>
>> "chellappa" <> wrote in message
>> news: oups.com...
>>> please give some examples
>>
>> Please preserve context when posting. Thank you.
>>
>> Please get a textbook. You won't get far without
>> one.
>>
>>
>> "Chris Dollin" <> wrote in message
>> news:dagmtd$lrl$...
>>> chellappa wrote:
>>>
>>>> please explain me , char pointer , char Array, char ,string...
>>>
>>> A decent book on C will explain all this, and be faster than
>>> drip-feeding via Usenet. But:
>>>
>>> A `char pointer` is a pointer that points to characters.
>>> A `char array` is an array whose elements are characters.
>>> A `char` is a value which is/represents a character.
>>> A `string` is a sequence of characters terminated by a
>>> null (== 0) character.
>>>
>>> [A `sequence of characters` is a contiguous slice out of an
>>> array or mallocated store.]
>>
>> "chellappa" <> wrote in message
>> news: oups.com...
>>> please give some examples
>>
>> char *p; /* 'char pointer' (a.k.a. 'Pointer to char'). */
>> / * can represent address of a type 'char' object */
>>
>> char a[10]; /* 'char array' (a.k.a. 'array of char'). */
>> /* can store ten type 'char' objects at */
>> /* contiguous memory locations */
>>
>> char c; /* a type 'char' object. Can represent any one */
>> /* of the values of the execution character set */
>>
>> char s[10] = "Hello" ; /* 'char array' (a.k.a. 'array of char'). */
>> /* The first six elements of the array */
>> /* (s[0] through s[5] inclusive) comprise */
> wrong !! the: char s[10] = "Hello" assign 7 elements,

Really? Please explain.

(BTW that definition dos not 'assign' anything, it
*initializes* the first six characters of the array.
Initialization and assigment are not the same thing.)


> don´t forget the zero termination of the string at position
> s[7]

I did not forget about the terminator, but it's location
is s[5]. None of s[6] through s[9] have been initialized or
assigned a valid value.

-Mike

Mike Wahler wrote:
> "Frank Mikkelsen" <> wrote in message
> news:42cc272e$0$21463$ ...
> >
> > "Mike Wahler" <> skrev i en meddelelse
> > news:YCRye.13635$ hlink.net...
> >>
> >> "chellappa" <> wrote in message
> >> news: oups.com...
> >>> please give some examples
> >>
> >> Please preserve context when posting. Thank you.
> >>
> >> Please get a textbook. You won't get far without
> >> one.
> >>
> >>
> >> "Chris Dollin" <> wrote in message
> >> news:dagmtd$lrl$...
> >>> chellappa wrote:
> >>>
> >>>> please explain me , char pointer , char Array, char ,string...
> >>>
> >>> A decent book on C will explain all this, and be faster than
> >>> drip-feeding via Usenet. But:
> >>>
> >>> A `char pointer` is a pointer that points to characters.
> >>> A `char array` is an array whose elements are characters.
> >>> A `char` is a value which is/represents a character.
> >>> A `string` is a sequence of characters terminated by a
> >>> null (== 0) character.
> >>>
> >>> [A `sequence of characters` is a contiguous slice out of an
> >>> array or mallocated store.]
> >>
> >> "chellappa" <> wrote in message
> >> news: oups.com...
> >>> please give some examples
> >>
> >> char *p; /* 'char pointer' (a.k.a. 'Pointer to char'). */
> >> / * can represent address of a type 'char' object */
> >>
> >> char a[10]; /* 'char array' (a.k.a. 'array of char'). */
> >> /* can store ten type 'char' objects at */
> >> /* contiguous memory locations */
> >>
> >> char c; /* a type 'char' object. Can represent any one */
> >> /* of the values of the execution character set */
> >>
> >> char s[10] = "Hello" ; /* 'char array' (a.k.a. 'array of char'). */
> >> /* The first six elements of the array */
> >> /* (s[0] through s[5] inclusive) comprise */
> > wrong !! the: char s[10] = "Hello" assign 7 elements,
>
> Really? Please explain.
>
> (BTW that definition dos not 'assign' anything, it
> *initializes* the first six characters of the array.
> Initialization and assigment are not the same thing.)
>
>
> > don´t forget the zero termination of the string at position
> > s[7]
>
> I did not forget about the terminator, but it's location
> is s[5]. None of s[6] through s[9] have been initialized or
> assigned a valid value.

Actually, s[6] through s[9] *have* been initialized to '\0'.

Robert Gamble

Mike Wahler wrote:
> "Frank Mikkelsen" <> wrote in message
> news:42cc272e$0$21463$ ...
>
>>"Mike Wahler" <> skrev i en meddelelse
>>news:YCRye.13635$ rthlink.net...

<snip>

>>>char s[10] = "Hello" ; /* 'char array' (a.k.a. 'array of char'). */
>>> /* The first six elements of the array */
>>> /* (s[0] through s[5] inclusive) comprise */
>>
>>wrong !! the: char s[10] = "Hello" assign 7 elements,
>
> Really? Please explain.
>
> (BTW that definition dos not 'assign' anything, it
> *initializes* the first six characters of the array.
> Initialization and assigment are not the same thing.)
>
>>don´t forget the zero termination of the string at position
>>s[7]
>
> I did not forget about the terminator, but it's location
> is s[5]. None of s[6] through s[9] have been initialized or
> assigned a valid value.

Actually, the entire array is initialised, with the elements not
specified by the string literal being initialised to 0.
--
Flash Gordon
Living in interesting times.
Although my email address says spam, it is real and I read it.