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Showing content from https://cplusplus.com/reference/cstdlib/div/ below:

function

div

div_t div (int numer, int denom);

 div_t div (     int numer,      int denom);ldiv_t div (long int numer, long int denom);

  div_t div (          int numer,           int denom); ldiv_t div (     long int numer,      long int denom);lldiv_t div (long long int numer, long long int denom);

Integral division

Returns the integral quotient and remainder of the division of numer by denom ( numer/denom ) as a structure of type div_t, ldiv_t or lldiv_t, which has two members: quot and rem.

Parameters

numer: Numerator.
denom: Denominator.

Return Value The result is returned by value in a structure defined in <cstdlib>, which has two members. For div_t, these are, in either order:

1
2

int quot;   // quotient
int rem;    // remainder

Portability In C, only the int version exists.
For the long int equivalent, see ldiv.
For the long long int equivalent, see lldiv.

Example

/* div example */
#include <stdio.h>      /* printf */
#include <stdlib.h>     /* div, div_t */

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.

Data races Concurrently calling this function is safe, causing no data races.

Exceptions (C++)No-throw guarantee: this function throws no exceptions.

If either part of the result cannot be represented, it causes undefined behavior.