Hi Varma,
You could have make the query more simple rather than talking about the working of a piece of code first up. You haven’t mentioned anything about your project that you are doing, which microcontroller, which IDE, where you want to show the output, your circuit etc.
Since you know that your are getting unexpected results, the reasons should be also unexpected.
Please post the details and explain the trouble your are facing in such a way that it will be easy for others to understand.