div Function

Calculates the quotient and remainder of two numbers.

Include

<stdlib.h>

Prototype

div_t div(int numer, int denom);

Arguments

numer

numerator

denom

denominator

Return Value

Returns the quotient and the remainder.

Remarks

The returned quotient will have the same sign as the numerator divided by the denominator. The sign for the remainder will be such that the quotient times the denominator plus the remainder will equal the numerator (quot * denom + rem = numer). Division by zero will invoke the math exception error, which, by default, will cause a Reset. Write a math error handler to do something else.

Example

#include <stdlib.h>
#include <stdio.h>

void __attribute__((__interrupt__))
_MathError(void)
{
  printf("Illegal instruction executed\n");
  abort();
}

int main(void)
{
  int x, y;
  div_t z;

  x = 7;
  y = 3;
  printf("For div(%d, %d)\n", x, y);
  z = div(x, y);
  printf("The quotient is %d and the "
         "remainder is %d\n\n", z.quot, z.rem);

  x = 7;
  y = -3;
  printf("For div(%d, %d)\n", x, y);
  z = div(x, y);
  printf("The quotient is %d and the "
         "remainder is %d\n\n", z.quot, z.rem);

  x = -5;
  y = 3;
  printf("For div(%d, %d)\n", x, y);
  z = div(x, y);
  printf("The quotient is %d and the "
         "remainder is %d\n\n", z.quot, z.rem);

  x = 7;
  y = 7;
  printf("For div(%d, %d)\n", x, y);
  z = div(x, y);
  printf("The quotient is %d and the "
         "remainder is %d\n\n", z.quot, z.rem);

  x = 7;
  y = 0;
  printf("For div(%d, %d)\n", x, y);
  z = div(x, y);
  printf("The quotient is %d and the "
         "remainder is %d\n\n", z.quot, z.rem);
}

Example Output

For div(7, 3)
The quotient is 2 and the remainder is 1

For div(7, -3)
The quotient is -2 and the remainder is 1

For div(-5, 3)
The quotient is -1 and the remainder is -2

For div(7, 7)
The quotient is 1 and the remainder is 0

For div(7, 0)
Illegal instruction executed
ABRT