Thread: Little Problem

Hi, I have a problem with this:

Code:

#include<iostream.h>

typedef unsigned long int ulong;

int main()
{
	ulong a,b;

   while(cin >> a >> b)
   {
		if(a==0 && b==0)
      	return 0;

      int count = 0, cry = 0;

      while(a || b)
      {
      	int x = a%10, y = b%10;

         a/=10;
         b/=10;

         if((x+y+cry)>9)
         {
           	cry = 1;
         	count++;
         }
         else
         	cry = 0;
      }

      if(count>1)
      	cout << count << " carry operations." << endl;
      else if(count == 1)
         cout << "1 carry operation." << endl;
      else
      	cout << "No carry operation." << endl;
   }

   return 0;
}

IO:

9 1
1 carry operation.
9 0
1 carry operation.
9 0
No carry operation
9 0
No carry operation
9 1
No carry operation
9 1
1 carry operation.


09 1
No carry operatio
1 carry operation

But what you'll tell about it's output? Can anyone explain...why this is so ...???