Out of range

[rachitagrawal]

    x = k*s;
    while (x > n)
    {  
        x = floor(( k*(x-n) - 1.0 )/ (k-1.0) );
        count++;
    }

In the above code n, k, s integers <= 1000000. Whenver x goes out of range of integer it gives me wrong output. I tried making it unsigned long long but still I am getting wrong answer. Can someone help me out in this?

Thanks in advance

[PanGalactic]

If n, k, and s are all integers, why do I see a floor() function and floating point constants? Why not use integer math?

If you need the large numbers then you probably need to look at a multi-precicsion library (such as http://gmplib.org/).

Is x an integer? What about count?

[rachitagrawal]

Earlier I was working with double values, so that floor was for that purpose. I can remove floor, not a big deal and other non-integer values.

Yes x and count are integers as well. Why is it not working with unsigned long long data type?

[PanGalactic]

When you say it is not working, what does that mean?

Show us a table of the values of x, k, s, & n for a few iterations before the problem and then when the problem appears.

[rachitagrawal]

Problem Solved.

Though x was unsigned long since k and s were integers, they were being saved in an intermediate integer variable and was then converted to unsigned long. Hence wrong result. Now its correct.

Thanks once again