floor

floor

Round Down a Floating-Point Number

Portability: ISO/ANSI C conforming, UNIX compatible

SYNOPSIS
DESCRIPTION
RETURN VALUE
IMPLEMENTATION
EXAMPLE
RELATED FUNCTIONS
SEE ALSO

SYNOPSIS

#include <math.h>

double floor(double y);

DESCRIPTION

floor rounds a real number down to the next smaller integral real number.

RETURN VALUE

floor accepts a floating-point argument y and rounds it down to the next smaller integer expressed as a floating-point number.

IMPLEMENTATION

floor is implemented as a built-in function unless it is undefined by an #undef statement.

EXAMPLE

#include <math.h>
#include <stdio.h>

int moda, modb, df;
double score, rank;

main()
{
   puts("Enter two integers: ");
   scanf("%d %d", &moda, &modb);

   puts("Enter an integer divisor: ");
   scanf("%d",&df);

      /* Add the two numbers, divide by the given divisor, */
      /*  and then round up to the closest integer less    */
      /*  than the result.                                 */
   score = ( moda + modb);
   score /= df;
   rank = floor(score);

      /* Print the rounded result (its "floor"ed value).   */
   printf("The floor of (%d + %d)/ %d = %f\n",moda,modb,df,rank);
}

RELATED FUNCTIONS

ceil

SEE ALSO

Mathematical Functions

Chapter Contents
Previous
Next
Top of Page