Hi Guys!
I'm sorry for my stupid question.
I want to use the operator "mod" (perhaps mod is pascal and not c++)
to calculate the rest of a division, to separate the odd and even number of
an array.
do you know what is the name of operator I need ? ("mod" is pascal ?)
do I need some libraries ? math.h or wath ?
Thank you
Jo 7 17378
Jo wrote: Hi Guys!
I'm sorry for my stupid question.
I want to use the operator "mod" (perhaps mod is pascal and not c++) to calculate the rest of a division, to separate the odd and even number of an array.
do you know what is the name of operator I need ? ("mod" is pascal ?)
%
do I need some libraries ? math.h or wath ?
No.
Jo wrote: Hi Guys!
I'm sorry for my stupid question.
I want to use the operator "mod" (perhaps mod is pascal and not c++)
to calculate the rest of a division, to separate the odd and even number of an array.
do you know what is the name of operator I need ? ("mod" is pascal ?)
do I need some libraries ? math.h or wath ?
Thank you
Jo
The operator is '%', there is no library required...
-Sacha
"Jo" <gr****@tiscali .it> schrieb im Newsbeitrag
news:8i******** **************@ news4.tin.it... Hi Guys!
I'm sorry for my stupid question.
I want to use the operator "mod" (perhaps mod is pascal and not c++)
to calculate the rest of a division, to separate the odd and even number of an array.
do you know what is the name of operator I need ? ("mod" is pascal ?)
do I need some libraries ? math.h or wath ?
if you want to do this on floats, you must use:
#include <math.h>
mod_val = fmod(number, divisor);
-Gernot
"Gernot Frisch" <Me@Privacy.net > wrote in message
news:35******** *****@individua l.net... "Jo" <gr****@tiscali .it> schrieb im Newsbeitrag news:8i******** **************@ news4.tin.it...
I want to use the operator "mod" (perhaps mod is pascal and not c++)
do I need some libraries ? math.h or wath ?
if you want to do this on floats, you must use: #include <math.h>
mod_val = fmod(number, divisor);
Iirc, that should read
#include <cmath>
mod_val = std::fmod (number, divisor);
?
regards
--
jb
(reply address in rot13, unscramble first)
Jakob Bieling wrote: "Gernot Frisch" <Me@Privacy.net > wrote in message news:35******** *****@individua l.net...
#include <math.h>
mod_val = fmod(number, divisor);
Iirc, that should read
#include <cmath>
mod_val = std::fmod (number, divisor);
Both are legal and both do the same thing.
--
Pete Becker
Dinkumware, Ltd. ( http://www.dinkumware.com)
"Pete Becker" <pe********@acm .org> wrote in message
news:sp******** ************@rc n.net... Jakob Bieling wrote:
"Gernot Frisch" <Me@Privacy.net > wrote in message news:35******** *****@individua l.net...
#include <math.h>
mod_val = fmod(number, divisor);
Iirc, that should read
#include <cmath>
mod_val = std::fmod (number, divisor);
Both are legal and both do the same thing.
Oh, did not know you can actually use math.h etc.
After a little more reading, I am now confused, though. I read 26.5/1-6
and D.5/2 of the Standard. In the former, they write about cmath/cstdlib
containing the same things as math.h/stdlib.h, _plus_ some additional
overloads. But in the latter, they write name.h includes the same thing as
cname, but places them in both the std and the global namespace.
Did I fail to see something? Afaik, it might make a difference, if
math.h includes those additions or not (ie. the long double overload, which
you need to avoid possible down-casting).
regards
--
jb
(reply address in rot13, unscramble first)
Jakob Bieling wrote: After a little more reading, I am now confused, though. I read 26.5/1-6 and D.5/2 of the Standard. In the former, they write about cmath/cstdlib containing the same things as math.h/stdlib.h, _plus_ some additional overloads. But in the latter, they write name.h includes the same thing as cname, but places them in both the std and the global namespace.
Did I fail to see something? Afaik, it might make a difference, if math.h includes those additions or not (ie. the long double overload, which you need to avoid possible down-casting).
When compiling C++ code math.h has the C++ overloads. As you noted,
cmath adds some things to the requirements for math.h from the C
standard. Appendix D says that when compiling C++ code math.h has all
the things that cmath has, and hoists them into the global namespace. So
math.h is usually not just the C header; it has to be modified for C++.
--
Pete Becker
Dinkumware, Ltd. ( http://www.dinkumware.com) This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics |
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