checking for whole number

is there a way to check to see if a number is whole?

You can check a floating point number to see if it is whole like this:

#include <math.h>
.
.
double d = 3.0000001;

if (floor(d) == d)
cout << "Number is a whole number.\n";

many times floating points will not evaluate to whole numbers
because of a lingering supersmall fraction... instead you check for a range of accuracy....


float flA = 3.0;
int iA = (int)3.0;

if( (flA - iA) > .001 ) ......