public class Luhn
{
    
public boolean isValid(long num, boolean mode5Variant){


return false;
}








    public Luhn()
    {
        //7 tests
        long[]  valid=  {5457623898234113l, 5304248862757314l  }  ;
        
        long[]  in_valid=  { 5457623898234114l, 5304248862757319l }  ;
        
        long total = valid.length + in_valid.length;
        long numCorrect = 0;
        boolean mode5Variant = false;
        
        for( int i = 0 ;i <valid.length ; i++)
            {
            if(isValid( valid[i] , mode5Variant ) )
                numCorrect++;
            else
                System.out.println("failed test for number " +valid[i] + ",  a valid number" ) ;
                
            }
         for( int i = 0 ;i <in_valid.length ; i++)
            {
            if(isValid( in_valid[i] , mode5Variant ) ==false )
                  numCorrect++;
            else
                System.out.println("failed test for number " +in_valid[i] + ",  an invalid number") ;
              
            
            }
        double p =  ( (double) numCorrect )/total  ;
        p = p * 100;
            
            
        System.out.println("total tests run : " + total);
        System.out.println(" Num correct : " + numCorrect);
        System.out.println(" % right  : " + p);
    }
}