N-Queens Problem

Question

I am coding the infamous N-Queens problem. But I have got a problem. The program is executing but ain't giving output as expected as I have encountered a problem as the matrix board values are not changed and are having the very first values assigned to board i.e, 0 assigned to each and every element of board. What could be the logical error?
Here is the link to code:
https://code.sololearn.com/co5K4zkcBvZv/#cpp

Answer 1

Omfg, I am really pissed off of myself. I debugged it, did everything and it was such a silly mistake. Thank you so very much, again.