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 ...???

Perhaps because 09 is treated as an (out of bounds) octal number

Hmmm...may be....
but what you'll tell about the 2nd and 3rd IO set ???

..i compiled that myself and it works OK - carry ops as expected...what compiler did u use? Try code

int x, y;

x = a % 10;
y = b % 10;

instead of

int x = a %10, y = b%10;

Hi, lobo but why this would happen???

I use borland C++ 5.02

And what your compiler (what's it?) says about 2 & 3 IO set???

I tried your code along with your inputs and it works fine -- tried it on bcc5.5... try the thing i wrote above, it may help (not surely, though ), else try different compiler if u can...