English
- #include "stdafx.h"
- #include "prime.h"
- #include <math.h>
- bool CPrime::IsPrime( int nNumber )
- {
- int nSqr = (int) sqrt( nNumber );
- for ( int i = 2; i < nSqr; i++ )
- {
- if ( nNumber % i == 0 )
- return false;
- }
- return true;
- }
- int CPrime::RoundUp( int nNumber )
- {
- while ( IsPrime( nNumber ) == false )
- ++nNumber;
- return nNumber;
- }
- int CPrime::RoundDown( int nNumber )
- {
- while ( IsPrime( nNumber ) == false )
- --nNumber;
- return nNumber;
- }
