/* Exercise in 'while' loop termination and semantics 
   Using a trace table/walkthrough work out precisely what is
	output by this program
*/
#include <iostream>
#include <string>

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

int main()
{  int i = 1;
   int j = 2;
   while ( i < 41 )
   {    dbug("a", i, j);
	j = 2*j;
	dbug("b", i, j);
	i = i+j;
	dbug("c", i, j);
	i = i+j;
	dbug("d", i, j);
	i = i+j;
	dbug("e", i, j);
	cout <<endl;
   }//end while

   return 0;
}//end main