What should be the output of the program??

Question

https://code.sololearn.com/ckTyI9kc2TbT/?ref=app

Answer 1

Output of the program is
101
t=101
rev =202
I do not know why it is coming

Answer 2

grab a paper and write down what your code does (or debug and trace in an IDE)
hint : printf returns number of outputed characters.
you'll get it.

Answer 3

Thanks miika you are absolutely correct. Thanks very much