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Pointr to function

Hi,
how can I make variable 'ptr' - an pointer to function taking parameter
'int' and returning 'float' ?

How can I define 'tPtr' to by type as above?

--
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~l-.~~~~~~~~~~~~~~~~~~~
GG-1175498 ____| ]____,
Rafal 'Raf256' Maj X-( * )
Rafal(at)Raf256(dot)com ,"----------"
Jul 22 '05 #1
4 1087
Rafal 'Raf256' Maj wrote:

how can I make variable 'ptr' - an pointer to function taking parameter
'int' and returning 'float' ?

How can I define 'tPtr' to by type as above?

typedef float function_t(int);
float f(int);
function_t ptr = f;

Jul 22 '05 #2
On Mon, 05 Jan 2004 14:17:51 -0800, "E. Robert Tisdale"
<E.**************@jpl.nasa.gov> wrote in comp.lang.c++:
Rafal 'Raf256' Maj wrote:

how can I make variable 'ptr' - an pointer to function taking parameter
'int' and returning 'float' ?

How can I define 'tPtr' to by type as above?
typedef float function_t(int);


Wrong, the typedef above does not establish any kind of pointer.

typedef float (function_t*)(int);
float f(int);
function_t ptr = f;


--
Jack Klein
Home: http://JK-Technology.Com
FAQs for
comp.lang.c http://www.eskimo.com/~scs/C-faq/top.html
comp.lang.c++ http://www.parashift.com/c++-faq-lite/
alt.comp.lang.learn.c-c++
http://www.contrib.andrew.cmu.edu/~a...FAQ-acllc.html
Jul 22 '05 #3
Jack Klein wrote in news:hj********************************@4ax.com:
On Mon, 05 Jan 2004 14:17:51 -0800, "E. Robert Tisdale"
<E.**************@jpl.nasa.gov> wrote in comp.lang.c++:
Rafal 'Raf256' Maj wrote:
>
> how can I make variable 'ptr' - an pointer to function taking
> parameter 'int' and returning 'float' ?
>
> How can I define 'tPtr' to by type as above?
>

typedef float function_t(int);


Wrong, the typedef above does not establish any kind of pointer.

typedef float (function_t*)(int);


You mean:

typedef float (*function_t)( int );
float f(int);
function_t ptr = f;


Rob.
--
http://www.victim-prime.dsl.pipex.com/
Jul 22 '05 #4
On 06 Jan 2004 06:51:27 GMT, Rob Williscroft
<rt*@freenet.REMOVE.co.uk> wrote in comp.lang.c++:
Jack Klein wrote in news:hj********************************@4ax.com:
On Mon, 05 Jan 2004 14:17:51 -0800, "E. Robert Tisdale"
<E.**************@jpl.nasa.gov> wrote in comp.lang.c++:
Rafal 'Raf256' Maj wrote:
>
> how can I make variable 'ptr' - an pointer to function taking
> parameter 'int' and returning 'float' ?
>
> How can I define 'tPtr' to by type as above?
>
typedef float function_t(int);


Wrong, the typedef above does not establish any kind of pointer.

typedef float (function_t*)(int);


You mean:

typedef float (*function_t)( int );


Oh no!!!

Tisdale's rubbing off on me!!!

Thanks for the correction.

--
Jack Klein
Home: http://JK-Technology.Com
FAQs for
comp.lang.c http://www.eskimo.com/~scs/C-faq/top.html
comp.lang.c++ http://www.parashift.com/c++-faq-lite/
alt.comp.lang.learn.c-c++
http://www.contrib.andrew.cmu.edu/~a...FAQ-acllc.html
Jul 22 '05 #5

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