Inverse a number

[S18LPC-OL0010 (Preesh Tiwari)]

how to inverse a number?
https://hack.codingblocks.com/contests/c/474/182

[r11 (r b)]

what is wrong with this code.it is not giving any output.mycompare function is not working.
https://ide.codingblocks.com/#/s/24060

[Abhishek-Vanjani-1385688111468238 (Abhishek Vanjani)]

You can check my code:
https://ide.codingblocks.com/#/s/24265