I don't know what my code's problem is. I have tested all input and got correct output, however I got WA#1 when summitting. Please help me!!

Edited by moderator 23.08.2020 01:19

Get least significant digit of number (number%10) and multiply it to the product variable.
Remove least significant digit form number (number = number/10).
Repeat above two steps, till number is not equal to zero.
http://www.techcrashcourse.com/2015/11/c-program-to-find-product-of-digits-of-number.html
http://www.techcrashcourse.com/2014/10/c-program-add-digits-number.html
http://www.techcrashcourse.com/2015/08/c-program-count-number-of-digits-in-integer.html