SAS/C Library Reference, Vol. 1

ldiv -- Integer Conversion: Division

SYNOPSIS

 #include <stdlib.h>

 ldiv_t ldiv(long int numer, long int denom);

DESCRIPTION

ldiv computes the quotient and remainder of numer divided by denom.

RETURN VALUE

div returns a structure of type ldiv_t, which contains both the quotient and remainder. The definition of the ldiv_t type is

 typedef struct {
    long rem;
    long quot;
 }ldiv_t;

The return value is such that

 numer == quot * denom + rem

The sign of rem is the same as the sign of numer.

EXAMPLE

This example converts an angle in radians to degrees, minutes, and seconds using ldiv:

  #include <math.h>
  #include <stdlib.h>
  #include <lcmath.h>

  main()
  {
     double rad, angle;
     long deg, min, sec;
     ldiv_t d;

     puts(" Enter any angle in radians: ");
     scanf("%f", &rad);

        /* Convert angles to seconds and discard fraction. */
     angle = rad * (180 * 60 * 60)/M_PI;

     sec = angle;
     d   = ldiv(sec, 60L);
     sec = d.rem;
     d   = ldiv(d.quot, 60L);
     min = d.rem;
     deg = d.quot;

     printf("%f radians = %ld degrees, %ld, %ldn", rad,
             deg, min, sec);
  }

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