C/Math/Round
Round down value: how to use floor
#include <stdio.h>
#include <math.h>
int main ()
{
printf ("floor of 3.3 is %.1lf\n", floor ( 3.3 ) );
printf ("floor of 4.8 is %.1lf\n", floor ( 4.8 ) );
printf ("floor of -3.3 is %.1lf\n", floor ( -3.3 ) );
printf ("floor of -4.8 is %.1lf\n", floor ( -4.8 ) );
return 0;
}
Round up a value: ceil
#include <stdio.h>
#include <math.h>
int main ()
{
printf ("ceil of 3.3 is %.1lf\n", ceil (3.3) );
printf ("ceil of 4.8 is %.1lf\n", ceil (4.8) );
printf ("ceil of -3.3 is %.1lf\n", ceil (-3.3) );
printf ("ceil of -4.8 is %.1lf\n", ceil (-4.8) );
return 0;
}