How can I get the quotient and the remainder in a single step?
22,394
Solution 1
div
will do this. See reference and example:
/* div example */
#include <stdio.h>
#include <stdlib.h>
int main ()
{
div_t divresult;
divresult = div (38,5);
printf ("38 div 5 => %d, remainder %d.\n", divresult.quot, divresult.rem);
return 0;
}
Output:
38 div 5 => 7, remainder 3.
EDIT:
The C Specification says:
7.20 General utilities
The types declared are size_t and wchar_t (both described in 7.17),
div_t
which is a structure type that is the type of the value returned by the div function,
ldiv_t
which is a structure type that is the type of the value returned by the ldiv function, and
lldiv_t
which is a structure type that is the type of the value returned by the lldiv function.
... but it doesn't say what the definition of div_t
is.
Solution 2
Yes, there is a standard function called div()
(and ldiv
, and maybe even lldiv
) that does this.
Author by
dtech
Updated on July 09, 2022Comments
-
dtech over 1 year
Possible Duplicate:
Divide and Get Remainder at the same time?Is it possible to get both the quotient and the remainder of integer division in a single step, i.e., without performing integer division twice?
-
John Dibling over 12 years@ddriver: Yes, but see my edit.
-
dtech over 12 yearsyes, thank you very much for the detailed response
-
Mike Steinert over 12 yearsFYI - The GLIBC implementation of
div
simply does a divide and a modulo, so you aren't gaining anything. Actually, what you gain is the function call overhead. -
caf over 12 years@MikeSteinert: That depends on your architecture - eg glibc has an assembly implementation of
div
for Alpha