Infix to Postfix Problem Code: INPSTFIX

Can anyone help with TC for my code?
Here is my code :
https://www.codechef.com/viewsolution/38924052

@sebastian, can you help me with this?

do I have to take into consideration even operators precedence? My code just only transfers the operators after the Alphabets

Ofcourse
You can refer this https://www.geeksforgeeks.org/stack-set-2-infix-to-postfix/