/* Exercise in a nested loops.
   Using a trace table/walkthrough work out precisely what is
	output by this program
*/
#include <iostream>
#include <string>

void dbug(int s, int a, int b)
{ cout << "DBUG " << s << ":  " << a << " " << b <<endl;
}

int main()
{  int i = 1;
   int j = 2;
   int n;
   while ( i < 41 )
   {    dbug(0, i, j);
	j = 2*j;
	for( n=1; n<4; n++)
	{  i = i+j;
	   dbug(n, i, j);
	}//end for
	cout <<endl;
   }//end while

   return 0;
}//end main