floor -- Round Down a Floating-Point Number


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 = %fn",moda,modb,df,rank);
}
RELATED FUNCTIONS
ceil
SEE ALSO
Mathematical Functions