<reponame>yanshengjia/cplusplus-practice-range
// Exercise 21.18: ex21_18.cpp
// This program determines if a value is a multiple of X.
#include <iostream>
using namespace std;

bool multiple( int );

int main()
{
   int y;

   cout << "Enter an integer between 1 and 32000: ";
   cin >> y;

   if ( multiple( y ) )
      cout << y << " is a multiple of X" << endl;
   else
      cout << y << " is not a multiple of X" << endl;
} // end main

// determine if number is a multiple of X
bool multiple( int number )
{
   bool isMultiple = true;

   for ( int i = 0, mask = 1; i < 10; i++, mask <<= 1 )

      if ( ( number & mask ) != 0 ) 
      {
         isMultiple = false;
         break;
      } // end if

   return isMultiple;
} // end function multiple


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